How much cannabis can you buy at once? Limits in 21 states

The 17 adult-use states use three systems, and one state does not fit neatly. California, New York, Illinois, Washington, Ohio, Oregon and Minnesota set a separate cap for each form, so an adult can buy the full flower amount and the full concentrate amount together. Colorado, Nevada, New Jersey, Massachusetts, Maryland, Connecticut and Missouri set one allowance shared across forms, so concentrate or edibles use up part of the flower limit. Arizona and Michigan set a single weight and allow only part of it to be concentrate: no more than 5 g of Arizona's ounce (A.R.S. 36-2852) and no more than 15 g of Michigan's 2.5 oz (MCL 333.27955). New Mexico lists its three caps side by side, but its regulator also refers to a total cumulative amount without saying how the forms add up.

The counting window differs too. California's rule binds each retailer, which may not sell one adult-use customer more than the limit in a single day (4 CCR 15409), and Ohio bars a dispensary from knowingly selling one adult-use customer more than the possession amount in the same day (R.C. 3796.20(C)(2)). Colorado and Arizona count per transaction, as does Michigan (Mich. Admin. Code R 420.506), and Colorado treats several sales to one person on the same business day as one transaction when staff know or should know the total would pass an ounce (Rule 6-110). New Jersey counts per sale and requires stores to make a good faith effort to stop a customer going over an ounce across several sales (N.J.A.C. 17:30-14.3). Massachusetts counts both ways: 2 oz per transaction, and no knowing sale of more than 2 oz to one person in a day (935 CMR 500.140(4)(c)).

Nevada, New York, Illinois and Washington tie purchases to what you may hold at one time, and Washington's rule bars any sale that helps a buyer end up with more than the possession amount (WAC 314-55-095). Ounces are not identical either: California writes its flower limit as 28.5 g, New Jersey's rule treats an ounce as 28.35 g, and Nevada's regulator converts 2.5 oz to 70.875 g. A store may also sell you less than the legal figure. New York's regulator says dispensaries may restrict amounts based on inventory, and Colorado's rule says nothing stops a store from refusing a sale (Rule 6-110(D)).

The newer adult-use states split the same way on timing. Maryland, Oregon and Connecticut count by the day: no store may knowingly sell anyone more than the personal use amount in a day (COMAR 14.17.12.04), more than the listed amounts at one time or within one day (OAR 845-025-2800), or more than 1 oz or its equivalent per day (Conn. Gen. Stat. 21a-421aa). Missouri and Minnesota count per transaction (19 CSR 100-1.180; Minn. Stat. 342.27, subd. 2), and New Mexico's caps cover what one customer buys at one time (16.8.2.40 NMAC).

California retailers may sell one adult-use customer no more than 28.5 g of non-concentrated cannabis, 8 g of concentrate and 6 immature plants in a single day (4 CCR 15409). Health and Safety Code 11362.1 sets the same 28.5 g and 8 g figures as the most an adult 21 or older may possess, buy, transport or give away, so the daily sale limit and the carry limit match. Neither rule draws a line between residents and visitors.

California has no milligram cap on a purchase. Its 8 g concentrate limit includes concentrate contained in cannabis products, so vape cartridges and edibles made with extract count against it, and the retailer is responsible for working out how much each product holds (4 CCR 15409). Package rules keep single items small: an adult-use edible package may hold no more than 100 mg of THC, and a package of concentrate no more than 1,000 mg (4 CCR 17304).

New York lets adults 21 and older possess, buy and transport up to 3 oz of cannabis and up to 24 g of concentrated cannabis (Penal Law 222.05), and the Office of Cannabis Management gives 3 oz (85 g) of flower and 24 g of concentrate as a single day's delivery purchase. The law counts any product with more than 3% total THC by weight or volume as concentrated cannabis (Cannabis Law 3), and OCM lists edibles and oils under the 24 g figure. At home, an adult may keep up to 5 lb (Penal Law 222.15).

Colorado caps a retail transaction at 1 oz of flower or its equivalent. The Marijuana Enforcement Division's rule sets 1 oz of flower as equal to 8 g of concentrate or 80 ten-milligram servings of THC, which is 800 mg, in edibles and other products (1 CCR 212-3, Rule 6-110). Non-edible, non-psychoactive topicals such as lotions and balms do not count, and a store may add up to six seeds. The carry limit is higher: House Bill 21-1090 ended the possession offense for 2 oz or less, though the constitution's own protection is written for 1 oz (Article XVIII, Section 16).

Nevada's statute lets adults hold up to 2.5 oz of usable cannabis and 1/4 oz of concentrated cannabis at one time (NRS 678D.200), figures that took effect on 1 Jan 2024 under Senate Bill 277. The Cannabis Compliance Board, which enforces sales, treats the two as one allowance: the concentrate side means products holding up to 7,087 mg of THC, and stores may not sell a combination over the limit. Its exchange chart scales them: half an ounce of flower leaves room for 5,670 mg of THC in other products, 1 oz leaves 4,255 mg, and 2.5 oz leaves none.

New Jersey stores may not sell one customer, in a single sale, more than 28.35 g (1 oz) of usable cannabis, 4 g of solid concentrate, 4 mL of liquid concentrate or vape oil, ingestible products with more than 1,000 mg of THC in total, or a mix that adds up to more than an ounce (N.J.A.C. 17:30-14.3). The Cannabis Regulatory Commission gives two legal mixes: half an ounce of flower with 2 g of concentrate, or half an ounce with five 100 mg packages of gummies. Ten such packages make up the full 1,000 mg.

Arizona allows adults 21 and older to possess, buy and transport 1 oz or less, with no more than 5 g of that ounce in the form of concentrate (A.R.S. 36-2852), and a licensed establishment may not sell more than that to one consumer in a single transaction (A.R.S. 36-2858). The concentrate is part of the ounce, not an addition to it, so a sale that includes the full 5 g of concentrate leaves room for roughly 23 g of flower.

Arizona sets no milligram cap on a sale. Its definition of marijuana concentrate leaves out the weight of food, drink and other ingredients combined with the extract (A.R.S. 36-2850), so the gummy or chocolate around the extract is not weighed as concentrate. The statute separately limits edibles to 10 mg of THC per serving and 100 mg per package (A.R.S. 36-2854). Like every other adult-use state in this guide except Illinois, Arizona writes its limits for any adult 21 or older, resident or not.

Illinois is the only one of the 17 adult-use states in this guide with a visitor rate. Since Public Act 104-463 took effect on 12 Jun 2026, residents 21 and older may possess 60 g of flower, 10 g of concentrate and 1,000 mg of THC in infused products, and adults who live elsewhere may possess 30 g, 5 g and 500 mg (410 ILCS 705/10-10). The limits are cumulative, so a person may hold the cap in each category at once, and no one may knowingly obtain from a dispensary an amount that would put them over. IDFPR's fact sheet of 23 Jun 2026 lists the old and new figures, which doubled.

Massachusetts trades one allowance between forms, as Colorado does, but the allowance is 2 oz. A retailer may not sell one customer more than 2 oz of marijuana, or its combined dry weight equivalent in concentrate or edibles, in one transaction, or knowingly in one day (935 CMR 500.140(3)(a), (4)(c)). The Cannabis Control Commission counts 1 oz of flower as 5 g of active THC in concentrate or 500 mg of active THC in edibles, so the whole allowance taken as concentrate is 10 g of THC, or 1,000 mg as edibles. Topicals and ointments have no daily cap.

The 2 oz figure took effect on 19 Apr 2026, when Chapter 65 of the Acts of 2026 doubled the carry limit and dropped the old 5 g concentrate cap; the Commission has a year from then to finish conforming its rules, so the equivalents may still change (St. 2026, c. 65). Adults may keep 10 oz at a primary residence, locked up above 2 oz (M.G.L. c. 94G, ss. 7, 13(b)), and the ID check asks for age, not residency (935 CMR 500.140(2)). Question 8, on the ballot for 3 Nov 2026, would end adult-use retail sales and cap possession at 1 oz, with no more than 5 g as concentrate, from 1 Jan 2028; the current limits apply until any change takes effect.

Michigan follows Arizona's model at a larger size. Adults 21 and older may possess, buy and transport 2.5 oz, of which no more than 15 g may be concentrate (MCL 333.27955), and a retailer may not sell more than that to one adult in a single transaction (Mich. Admin. Code R 420.506). The 15 g counts within the 2.5 oz, so a sale with the full 15 g of concentrate leaves room for roughly 56 g of flower, and the rule names no milligram figure for edibles. Because the cap is set per transaction, the possession limit is what governs a second purchase. At home the ceiling is 10 oz plus the household's own harvest, locked up above 2.5 oz (MCL 333.27954, 333.27955), and visitors get the same figures as residents.

Washington counts each form on its own, as California does, with more categories. A store may sell any adult 21 or older, in any combination, up to 1 oz of useable cannabis, 16 oz of solid infused product, 72 oz of liquid infused product and 7 g of concentrate (RCW 69.50.360), and those amounts are also the possession limit (RCW 69.50.4013). Drinks packed in units of 4 mg of THC or less are counted by THC instead, up to 200 mg, under a 2024 amendment (chapter 9, Laws of 2024). Solid edibles are capped by weight, not THC, though each package may hold no more than 100 mg of delta-9 THC (WAC 314-55-095). Visitors get the resident limit.

Ohio sets two statutory caps. No one may knowingly possess more than 2.5 oz of plant material and 15 g of extract, counting store-bought and homegrown cannabis together (R.C. 3796.221(B)), and a dispensary may not knowingly sell one adult-use customer more than that in a day (R.C. 3796.20(C)(2)). The Division of Cannabis Control applies the daily cap as 2.5 oz of flower, 15,000 mg of total THC across all other products and 6 seeds, clones or live plants (DCC), and under the package rule in effect since 5 Oct 2026 an adult-use edible package may hold no more than 100 mg (OAC 1301:18-4-06). The statute weighs extract and does not name edibles or drinks, so 15 g is the figure that defines the possession offense.

The numbers are older than their current home. Issue 2, passed on 7 Nov 2023, put them in R.C. 3780.36, which counted 2.5 oz of cannabis in any form other than extract; Senate Bill 56, signed on 19 Dec 2025, repealed Chapter 3780 as of 20 Mar 2026 and moved the limit to R.C. 3796.221, which counts plant material, though DCC's FAQ answer on possession still cites the old law. Ohio has no residency rule for adult-use buyers (R.C. 3796.01), but it protects only cannabis from an Ohio dispensary or a lawful home grow, so product bought in another state is not covered at any amount (R.C. 3796.221).

Maryland's limit is the personal use amount: 1.5 oz of flower, 12 g of concentrate or products holding 750 mg of THC, and a dispensary may not knowingly sell one person more than that in a day (Criminal Law 5-101; COMAR 14.17.12.04). The Maryland Cannabis Administration treats the three as one combined limit, so a shopper who takes the full amount of one type may not add any other, and its list of violations includes 1.5 oz of flower plus a 1 g vape cartridge; the guidance sets no exchange rate for a smaller mix. Vapes and infused pre-rolls are weighed as concentrate, an adult-use edible package may hold no more than 100 mg of THC, topicals are not limited, and visitors share the resident caps.

Connecticut writes its equivalents into the statute. For possession, 1.5 oz of plant material equals 7.5 g of concentrate or other products with 750 mg of THC, and a mix of forms is converted and added together (Conn. Gen. Stat. 21a-279a). Stores work to a lower ceiling: a retailer may not knowingly sell one consumer more than 1 oz, or the equivalent 5 g of concentrate or 500 mg of THC, in a day, and the Commissioner may post lower temporary per-transaction limits (21a-421aa, as amended by Public Act 26-8). DCP's consumer pages list 1 oz per transaction per day, but this guide found no notice lifting the half-ounce limit DCP set from 1 Dec 2023, so ask at the counter. The 5 oz an adult may keep locked at home or in their own car's glove box or trunk is tied to their own residence or vehicle, so most visitors should plan around 1.5 oz, which DCP says applies to them.

Missouri's allowance is the largest of the three: 3 oz of dried, unprocessed marijuana or its equivalent, both per transaction and in possession, for visitors and residents alike (Missouri Constitution, Article XIV, Section 2.10; 19 CSR 100-1.180). State rules count 1 oz of flower as 8 g of concentrate or 800 mg of THC in infused products, so the whole allowance is 24 g of concentrate or 2,400 mg of THC, and for edibles the THC total on the label counts, not the package weight (19 CSR 100-1.010; DCR). Each sale is checked in the state's tracking system, and a store that knows, or should know, that a customer is passing the limit over several purchases in one day has to report it.

Oregon counts each form on its own, as Washington does, with more room for flower and concentrate. A store may not knowingly sell one person, at one time or within one day, more than 2 oz of usable marijuana, 16 oz of solid products, 72 fl oz of liquid products, 10 g of extracts or concentrates, 10 g of products made for inhaling, 4 immature plants and 10 seeds (OAR 845-025-2800). Adults may carry 2 oz of usable marijuana in public and hold 8 oz in all, alongside 16 oz of solid products or concentrates, 72 oz of liquids and 1 oz of extracts from a licensed store (ORS 475C.337). An adult-use edible may hold no more than 100 mg of THC a package (OLCC IB2022-01), and visitors get the resident limits.

Minnesota also sets separate caps, applied per transaction: up to 2 oz of flower, up to 8 g of concentrate, and edibles and hemp edibles with up to 800 mg of THC, all in one sale (Minn. Stat. 342.27, subd. 2). Those figures double as the carry limits, except that an adult may keep up to 2 lb of flower at a private residence (342.09, subd. 1), and stores may not knowingly sell anyone more than that person may lawfully hold (342.27, subd. 12). An edible package may hold 200 mg of THC, at no more than 10 mg a serving, and the statute draws no line between residents and visitors.

New Mexico does not fit neatly into either system. The Cannabis Regulation Act and the Cannabis Control Division's sales rule set 2 oz of cannabis, 16 g of extract, 800 mg of edible cannabis and 6 immature plants as the most one customer may buy at one time, listed side by side like separate caps (NMSA 26-2C-3; 16.8.2.40 NMAC). The division's consumer FAQ, though, says buyers may not exceed the individual amounts 'or total cumulative amount', and neither the statute nor the rule gives a conversion, so treat each figure as a ceiling and ask how the store counts a mixed order. Larger amounts are lawful only when stored out of public view at your own residence, and the law bars any residency rule for buyers (26-2C-25, 26-2C-6).

Home growing is legal for adults in 14 of the 17 adult-use states, with different caps. California allows 6 living plants per private residence (Health and Safety Code 11362.1, 11362.2), and a retailer may sell an adult-use customer 6 immature plants a day (4 CCR 15409). New York allows 3 mature and 3 immature plants per person and no more than 6 of each per residence (Penal Law 222.15). Arizona allows 6 plants at an adult's primary residence and 12 where two or more adults live (A.R.S. 36-2852).

Colorado allows 6 plants, no more than 3 of them flowering (Article XVIII, Section 16), and House Bill 17-1220 caps a residence at 12. Nevada allows 6 per adult and 12 per residence (NRS 678D.200), but growing within 25 miles of a licensed retail store is an offense (NRS 678D.310). New Jersey's regulator says the law gives it no authority to allow any home growing, and in Illinois only registered medical patients may grow, up to 5 plants per household (410 ILCS 705/10-5). Home-grow allowances do not raise what anyone may buy at the counter.

Massachusetts and Ohio allow 6 plants per adult and 12 per residence, only at the grower's primary residence, so the allowance does not travel to a hotel or vacation rental (M.G.L. c. 94G, s. 7; R.C. 3796.04). Michigan allows 12 per residence however many adults live there (MCL 333.27955), and its stores may sell 3 immature plants per transaction (Mich. Admin. Code R 420.506). Washington allows no adult-use home grow: only authorized medical patients may grow, 4 to 15 plants and no more than 15 per housing unit (RCW 69.51A.210, 69.51A.260), and growing without authorization is a class C felony (RCW 69.50.401).

Among the newer adult-use states, Maryland allows the fewest plants, 2 per residence, grown out of public view (Criminal Law 5-601.2), and Oregon allows 4 per household however many adults live there (ORS 475C.305). Minnesota allows 8 per residence, no more than 4 of them flowering, only at an adult's primary residence (Minn. Stat. 342.09, subd. 2), and Connecticut allows 3 mature and 3 immature plants per adult, 12 per household, only indoors at a Connecticut primary residence, so visitors cannot grow there (Conn. Gen. Stat. 21a-278c; DCP). New Mexico allows each adult 6 mature and 6 immature plants, no more than 12 mature per household, and lets growers keep the whole harvest (NMSA 26-2C-25). Missouri allows 6 flowering plants, 6 nonflowering plants and 6 clones, but only with a state cultivation card (Missouri Constitution, Article XIV, Section 2.10; 19 CSR 100-1.040).

Stores in those states sell starter plants within limits: 4 immature plants and 10 seeds a day in Oregon (OAR 845-025-2800), 6 immature plants a sale in New Mexico (16.8.2.40 NMAC), 2 clones or seedlings to an adult in Maryland (MCA), and in Missouri plants go only to card holders, no more than 6 a day (19 CSR 100-1.180). Three of the four medical-only states are stricter. Florida, Pennsylvania and Texas allow no home growing for anyone, patients included, and charge it as manufacturing or as possession of marijuana (s. 893.13; 35 P.S. 780-113; Health and Safety Code 481.121), while Oklahoma lets licensed patients, including holders of its 30-day out-of-state license, grow 6 mature plants and 6 seedlings on property they own or with the owner's written permission (63 O.S. 420(A), 427.12).

At the counter, stopping the sale is the store's job. Nevada's regulator recommended that stores update their point-of-sale systems so transactions do not exceed the limit, and New York bars stores from knowingly selling an amount that would put a customer over the possession limit (9 NYCRR 123.10(g)). The legal risk comes from stacking purchases and carrying the total. In California, holding more than 28.5 g or more than 8 g of concentrate can bring up to 6 months in county jail, a fine of up to $500, or both (Health and Safety Code 11357). In New York, more than 3 oz or 24 g is a violation with a fine of up to $125 (Penal Law 222.25).

Colorado makes more than 6 oz of marijuana, or more than 3 oz of concentrate, a level 1 drug misdemeanor (House Bill 19-1263). Nevada's exemption ends above its limit (NRS 678D.200), and outside it, possessing more than 1 oz of marijuana or more than 1/8 oz of concentrate is a category E felony (NRS 453.336). Arizona makes more than 1 oz but not more than 2.5 oz, with up to 12.5 g of concentrate, a petty offense with a fine of up to $300, and more than that a class 6 felony (A.R.S. 36-2853, 13-802, 13-3405).

New Jersey charges no crime for 1 oz to 6 oz, though police may seize anything over 1 oz even if it was bought legally, and more than 6 oz is a fourth-degree crime (N.J.S.A. 2C:35-10). Illinois grades unlawful possession by weight under the Cannabis Control Act, from a civil fine of $100 to $200 for 10 g or less, to a Class B misdemeanor above that up to 60 g, to a Class A misdemeanor above 60 g up to 100 g (720 ILCS 550/4). New York makes more than 16 oz, or more than 5 oz of concentrate, a class A misdemeanor (Penal Law 222.30).

Massachusetts and Michigan handle a modest excess as a civil matter. In Massachusetts, carrying more than 2 oz but no more than 3 oz outside the home brings a civil penalty of up to $100 and forfeiture of the excess (M.G.L. c. 94G, s. 13(e), as amended by St. 2026, c. 65). Above 3 oz outside the home, c. 94C, s. 34, as amended by St. 2026, c. 65, s. 9, allows up to 6 months in a house of correction, a $500 fine or both, though a first offender is placed on probation unless they decline or the court gives written reasons. In Michigan, more than 2.5 oz and up to 5 oz away from home is a civil infraction with a fine of up to $500 for a first violation; above twice the limit it is a misdemeanor with no jail unless the violation was habitual, willful and for a commercial purpose, or involved violence (MCL 333.27965).

Washington and Ohio charge an excess as a crime. In Washington, more than 1 oz of flower but no more than 40 g is a misdemeanor punishable by up to 90 days in jail, a fine of up to $1,000 or both, and more than 40 g is a gross misdemeanor with up to 180 days, a fine of up to $1,000 or both (RCW 69.50.4014, 9.92.030, 69.50.4013). Ohio uses its drug code (R.C. 3796.99(D)): for plant material, under 100 g is a minor misdemeanor with a fine of up to $150, 100 to 200 g a fourth-degree misdemeanor and 200 to 1,000 g a fifth-degree felony (R.C. 2925.11, 2929.28). Its hashish scale, which covers concentrates, reaches a felony from 10 g of solid or 2 g of liquid, and the statute does not say which scale applies to extract over 15 g.

The newer adult-use states mostly start with a fine. Maryland's civil fine of up to $250 covers amounts above the personal use amount up to 2.5 oz of flower, 20 g of concentrate or 1,250 mg of THC, and more is a misdemeanor with up to 6 months in jail and a $1,000 fine (Criminal Law 5-101, 5-601). Connecticut fines $100 for a first offense above 1.5 oz and below 5 oz, $250 after that, and $500 at 5 oz or more outside locked storage, with a repeat at that level a class C misdemeanor, and police seize all of the cannabis (Conn. Gen. Stat. 21a-279a). Missouri makes holding up to twice its 3 oz limit a civil infraction carrying a penalty of up to $250 the first time (Missouri Constitution, Article XIV, Section 2.10(6)), and Minnesota makes more than 2 oz and up to 4 oz of flower outside your residence a petty misdemeanor with a fine of up to $300 (Minn. Stat. 152.0263, 609.02).

Larger excesses are crimes in those states. In Oregon, holding no more than double a limit is a Class B violation carrying a fine of up to $1,000, between double and four times the limit a Class B misdemeanor, and beyond that a Class A misdemeanor; more than 16 times any limit other than the 2 oz public one is a Class C felony (ORS 475C.337, 153.018). New Mexico makes more than 2 oz and up to 8 oz in public a misdemeanor, and more than 8 oz of cannabis, 64 g of extract or 3,200 mg of edibles in public a fourth degree felony (NMSA 26-2C-30). Minnesota's penalties reach up to five years in prison for more than 2 lb of flower (152.0263). Above twice Missouri's limit, a possession statute last amended before legalization still makes more than 35 g a class D felony, and this guide found no court or agency statement on how it applies to adults (RSMo 579.015).

In the four medical-only states a visitor without a patient license has no legal allowance, so the question is how a charge is graded. Florida makes 20 g or less of plant cannabis a first-degree misdemeanor, with up to a year in jail, and more than 20 g, or any marijuana concentrate, vape oil or extract-infused edible, a third-degree felony (s. 893.13, 775.082). Pennsylvania makes 30 g of marijuana or 8 g of hashish or less a misdemeanor with up to 30 days in jail and a $500 fine (35 P.S. 780-113). Without an OMMA license, Oklahoma makes simple possession a misdemeanor with up to a year and a $1,000 fine, or a citation of up to $400 for 1.5 oz or less if you can state a medical condition, and 25 lb or more is felony trafficking (63 O.S. 2-402, 2-415, 420(B)). Texas makes 2 oz or less a Class B misdemeanor with up to 180 days and a $2,000 fine, and less than 1 g of concentrate a state jail felony (Health and Safety Code 481.121, 481.116; Penal Code 12.22, 12.35).

Medical limits are built differently: most are tied to a clinician's recommendation and measured over days or weeks rather than per visit. California lets a retailer sell a medicinal patient 8 oz of dried flower and 12 immature plants a day, or the amount a physician's recommendation specifies, and the adult-use and medicinal limits cannot be combined to buy more (4 CCR 15409). Colorado's medical stores may sell a patient 2 oz of flower, 8 g of concentrate or products with 20,000 mg of THC per business day, with a 2 g concentrate limit for patients 18 to 20 (Rule 5-125).

Longer windows are the norm elsewhere. New York patients may buy up to a 60-day supply, or 3 oz of cannabis or 24 g of concentrate, whichever is greater (OCM). New Jersey caps patients at 85 g (3 oz) per 30 days, with the practitioner setting the dose (CRC). Arizona patients may obtain no more than 2.5 oz from dispensaries in any 14-day period (A.R.S. 36-2816). Illinois sets an adequate supply at 2.5 oz per 14 days, with a waiver possible on a clinician's signed statement (410 ILCS 130/10). Nevada's cardholder limit is 2.5 oz and 12 plants (NRS 678C.200).

A card from home helps visitors only in some states. Nevada treats a nonresident authorized at home as a cardholder within its medical limits (NRS 678C.470), New York's Registered Organization dispensaries may serve patients certified by other states under rules in effect since 22 Jul 2026, and New Jersey offers visiting patients a six-month card through a New Jersey practitioner. Arizona honors an out-of-state card for possession but not for buying at a dispensary (A.R.S. 36-2804.03). Colorado's medical stores require a Colorado registry card or application (Rule 3-405), and Illinois issues cards to residents, so visitors there buy under adult-use limits.

Massachusetts, Michigan, Washington and Ohio each measure medical supply their own way. Massachusetts sets a registered patient's 60-day supply at 10 oz unless a certifying provider decides otherwise (935 CMR 501.002), and Michigan lets registered patients buy 2.5 oz a day and 10 oz a month (Mich. Admin. Code R 420.506). Washington patients in the state database may buy 3 oz of flower, 48 oz of solid product, 216 oz of liquid and 21 g of concentrate at a medically endorsed store (RCW 69.51A.210; WAC 314-55-095), and Ohio holds patients to the adult-use daily figures but lets them buy up to four days' worth at once, 10 oz of plant material and 60,000 mg of THC in other products, with a 90-day supply as the ceiling on what they hold (OAC 1301:18-8-09; R.C. 3796.22(B); DCC).

Of those four, only Michigan honors a card from home. Another state's registry card has the same force as a Michigan card for a visiting patient, meaning someone who lives elsewhere or has lived in Michigan for less than 30 days (MCL 333.26423, 333.26424(k)), and provisioning centers may sell to visiting patients (R 420.505). Massachusetts limits medical sales to registered patients, who must be residents apart from certain non-residents receiving end-of-life, palliative or cancer care in the state (935 CMR 501.002). Washington requires residency at diagnosis (RCW 69.51A.010), and Ohio requires it unless a reciprocity agreement says otherwise; this guide found none on DCC's patient pages (OAC 1301:18-10-01).

Among the newer adult-use states, Maryland and Oregon serve only their own registered patients, so a visiting patient buys under the adult-use limits (MCA; ORS 475C.783). Connecticut has accepted other states' cards since 1 Oct 2026: a qualifying out-of-state patient shows the home-state card and a photo ID from the same state, completes a DCP form before each purchase, and may possess up to 5 oz together with a caregiver. The statute lets a store sell such a patient up to 5 oz a day, though DCP's program comparison lists 5 oz a month (Conn. Gen. Stat. 21a-408a, 21a-421aa, as amended by Public Act 26-8; DCP).

New Mexico registers visiting patients at the counter as reciprocal participants, who may buy 425 units in any 90 days, a unit being 1 g of dried flower or 200 mg of THC in a product (7.34.3.9, 7.34.3.22 NMAC). Missouri lets each dispensary decide whether to accept a substantially equivalent card from another state, and no state page read for this guide says which limit then applies; its own patients may buy 6 oz in 30 days unless a certifier allows more (Missouri Constitution, Article XIV, Section 1.5; 19 CSR 100-1.040). Minnesota's medically endorsed stores may sell to visiting patients, but the exemption from possession limits is written for patients in Minnesota's own registry, so visitors stay within 2 oz, 8 g and 800 mg (Minn. Stat. 342.51, subd. 2a; 342.09).

These four states have no adult-use market, so the only purchase limits are for registered patients, and three of them sell to no visitor at all. Florida's treatment centers dispense only to patients and caregivers with an active Florida registry card, a group that includes seasonal residents who live in the state at least 31 consecutive days a year, and the state honors no card from elsewhere (s. 381.986; OMMU). A Florida patient may hold up to a 70-day supply and, for smokable flower, up to 4 oz, and may buy no more than 2.5 oz of flower in 35 days unless the department approves more; since 24 Aug 2026 a 70-day supply is capped at 24,500 mg of THC in non-smokable forms (s. 381.986; Rule 64-4.224).

Pennsylvania dispensaries serve only residents registered with the Department of Health, and the act's old provision for patients from other states is listed as expired (35 P.S. 10231.103, 10231.303). A patient may receive up to a 90-day supply, which the rules set at 192 units, and cannot get more while more than a 7-day supply remains; one unit is 3.5 g of dry leaf, 1 g of concentrate or 100 mg of THC in a pill, oil, liquid, tincture or topical (35 P.S. 10231.405; 28 Pa. Code 1141a.21, 1161a.24).

Texas fills low-THC prescriptions only for permanent Texas residents entered in its Compassionate Use Registry, and the Department of Public Safety says it will not fill a prescription written in another state (Occupations Code 169.003; Health and Safety Code 487.107). The limit comes from the prescription, not an ounce figure: a 90-day supply that may be refilled up to four times, no more than 10 mg of THC in each dosage unit, and no package or inhalation device holding more than 1 g of THC (Occupations Code 169.001, 169.003; Health and Safety Code 487.107).

Oklahoma is the exception for visiting patients. Its dispensaries may sell only to holders of an Oklahoma Medical Marijuana Authority license, but state law offers patients licensed elsewhere a temporary license good for 30 days and never past the home card's expiry, and OMMA accepts only cards issued by a state government, so Texas patients do not qualify (63 O.S. 420(F); OAC 442:10-2-5, 442:10-5-12; OMMA). A licensee may buy up to 3 oz of marijuana, 1 oz of concentrate and 72 oz of edibles in one sale, and may hold 3 oz on their person and 8 oz at their residence, along with 1 oz of concentrate, 72 oz of edibles and 72 oz of topicals, all at once (63 O.S. 420(A), 427.8).

San Jose uses California's amounts but narrows who can buy them. The city's cannabis chapter restates the state's 28.5 g and 8 g figures in its statement of purpose and sets no different amount (SJMC 6.88.010); it requires dispensaries to sell in strict accordance with state law and says the most restrictive law governs if city and state rules conflict (SJMC 6.88.440 B, Z). It also bars medical sales to anyone under 21 (SJMC 6.88.440 J, K), so in San Jose the 8 oz medical daily limit is open only to patients 21 and older.

One San Jose rule can end a shopping day early. An adult who arrives with anyone under 21 is not allowed in and may not receive any cannabis for the rest of that business day (SJMC 6.88.440 H). Every person entering is checked with an electronic age verification device (SJMC 6.88.440 I), and only businesses registered with the city may deliver cannabis in San Jose (SJMC 6.88.445). Home growers in San Jose are held to 6 plants indoors, and outdoor cultivation is banned (SJMC 6.88.900 C).

Chicago adds a city penalty rather than a different number. Its ordinance makes it a city violation to possess cannabis in violation of Section 4 of the Cannabis Control Act, which covers possession the state's cannabis act does not allow, with a fine of $50 for a first offense and $100 for a repeat within 30 days, in addition to any other penalty (Municipal Code 7-24-099, as passed 26 Nov 2019). Visitors in Chicago are held to Illinois's non-resident limit of 30 g, 5 g and 500 mg.