Cannabis Purchase Limits: How Much Weed Can You Buy?

how much weed can you buy

Maybe you want to stock up on a good vape pen deal or buy enough weed to last through the winter. All this planning ahead can leave you wondering: how much weed can you buy? In some states, it’s based only on weight, and in others, the THC percentage matters. Here are a few of the top states and their laws, plus all the details on why the totals vary and who’s tracking them. 

Cannabis Compliance Varies by State

Cannabis remains federally illegal, so regulations are governed by the state. When a new state legalizes cannabis, a governing authority is in charge of this program. In California, it’s the Bureau of Cannabis Control, and in New Mexico, it’s the Cannabis Control Division. Every state has a different authority, and its job is to determine how much weed you can buy in a day and in what form. 

How Do Dispensaries Track Quantity?

Once a state’s cannabis authority is established, they have to decide on a state tracking system. METRC, Track and Trace, and BioTrack are some of the cannabis tracking systems (CTS) available. These systems track cannabis from “seed to sale” with incredible detail. For example, if a cannabis plant moves from its incubator room into a vegetation room, a staff member would need to document this change with a very specific transaction. 

The same thing happens at a retail level but with even more complexity. Retailers must abide by this system of moving and tracking inventory, but the state-approved programs are not retail-friendly. So, they do not track sales and count dollars and offer the perks that a traditional point-of-sale system (POS) offers. Instead, retailers opt for one of the dozens of solutions like FlowHub, GreenBits, LeafLogix, and many more. 

Each of these integrates with the state’s CTS, and monitors and reports on every transaction. Within these platforms, purchases are documented based on a medical marijuana card number or a state ID for recreational users. 

How Much Weed Can You Buy in California?

Weed is legal in California, and adults over 21 can purchase up to 28.5 grams (just over an ounce) of weed daily. This is the non-concentrated total, so just raw cannabis or pre-rolls. In addition, you can buy 8 grams of concentrate or extract like live resin or rosin. The concentrate total includes products like edibles that are infused with concentrate. 

You may also purchase up to 6 immature plants per day. However, keep in mind that Californians may only grow 6 plants per residence, so unless you’re killing clones on the daily, you probably won’t be buying them often. 

How Much Weed Can You Buy in CA With a Medical Card?

Medical marijuana patients in California can buy up to 8 ounces of cannabis per day. 

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How Much Weed Can You Buy in New Mexico?

For adult recreational users in the legal weed state of New Mexico, the daily purchase limits are 2 ounces of cannabis, 16 grams of cannabis concentrates or extracts (like budder, shatter, and crumble), and 800mg THC of edibles. You can purchase all of this at one time, but it’s the daily limit. Adults can have up to 12 plants per household—6 immature and 6 mature.

How Much Weed Can You Buy in NM With a Medical Card?

New Mexico medical marijuana cardholders can buy up to 230 “units” of cannabis products over the course of 90 days. This is about the equivalent of 8 ounces of cannabis. One unit is defined as either 1 gram of raw cannabis or 200mg THC. 

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How Much Weed Can You Buy in Arizona?

Weed is newly legal in Arizona, with slightly smaller purchasing limits than in some other states. Adults over 21 may purchase up to 28 grams (one ounce) of cannabis in a single day. No more than 5 grams of the 28-gram limit can be in concentrate form. That includes vape pens, extracts, or infused products. 

Keep in mind that possession of over one ounce is illegal in Arizona, so it’s not advised that you stock up on your limits every single day. 

How Much Weed Can You Buy in AZ With a Medical Card?

Arizona medical marijuana patients may buy up to 2.5 ounces every 14 days. 

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How Much Weed Can You Buy in Oklahoma?

Recreational weed is still illegal in Oklahoma, so there are no dispensaries available for the general public. However, medical marijuana is legal in Oklahoma, and the state boasts the most dispensaries in the nation, with more than 2,000 and counting.

How Much Weed Can You Buy in OK With a Medical Card?

Oklahoma medical marijuana patients have a fairly large purchase limit compared to many other states. Their purchase limits are based on transactions instead of daily or monthly limits. The totals allowed are up to 3 ounces of cannabis, 1 ounce of cannabis concentrate or extract, and 72 ounces of edibles. 

Patients may also buy and grow up to 6 cannabis plants for personal use.

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How Much Weed Can You Buy in Illinois?

Adults over 21 in the legal weed state of Illinois can purchase (and possess) up to 30 grams of cannabis (in any dried form). As for cannabis concentrates, the Illinois limits are a maximum of 500mg for THC-infused products, or 5 grams of cannabis concentrate or extract. These rules apply to in-state residents only and are not daily limits but tracked over the course of two weeks.

Out-of-state tourists shopping in Illinois can purchase up to 15 grams of dried cannabis and a maximum of 250mg THC in any kind of infused product, or up to 2.5 grams of cannabis concentrate or extract.

How Much Weed Can You Buy in IL With a Medical Card?

The rules for recreational consumers and medical marijuana patients vary some. Instead of 30-gram purchase limits, cardholders may purchase up to 71 grams. Still, these are not daily allowances, and the state tracks them in 14-day increments. Patients may also grow up to 5 plants at home for personal use.