Purchasing Limit

Purchasing limits vary by state and product type. A common recreational limit is one ounce (28 grams) of cannabis flower per transaction, with equivalent limits for other product forms. For example, one ounce of flower might be equivalent to 8 grams of concentrate, 800 milligrams of THC in edibles, or a combination thereof. Medical patients often have higher limits, sometimes two to four ounces or more per month, reflecting the assumption that medical users may need larger quantities for ongoing treatment.

Dispensaries enforce purchasing limits through their point-of-sale systems, which track transactions against the state's tracking database. In states with comprehensive seed-to-sale systems, purchases are logged against a customer's ID to prevent exceeding daily or monthly limits across multiple dispensaries. For most consumers, purchasing limits are not a practical constraint, as one ounce of flower is more than enough for personal use over several weeks. Heavy consumers or patients with high-dose needs may find limits more restrictive, which is one reason medical programs often provide higher allowances.