The short answer: home cultivation limits come from state law, not from Washington, and they almost always cap plants in two ways, per adult and per household. Most legal states land between 2 and 12 plants per household, a few medical programs allow more, and a handful of states allow no home grow at all. Before you buy seeds or clones, confirm three numbers for your exact address: plants per person, plants per household, and how many may be mature or flowering at once. Ordering genetics for more plants than your cap allows is the most common and most avoidable buying mistake in this category.
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The numbers that actually matter at checkout
State rules usually regulate three things at the same time. The first is the per person plant count. The second is the household cap. The third is a mature or flowering sublimit, which is the number that decides how much you can harvest at once. A state that allows six plants per person with a twelve plant household cap lets a two adult home run twelve, but a single adult in the same state is still limited to six. Immature plants and seedlings sometimes fall under a separate allowance, which is why growers who plan around the mature limit rarely run into compliance problems.
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What to check before buying seeds or clones
- Age and residency: most adult use states require 21 and older, and some require state residency for home grow.
- Mature plant cap: buy genetics in batches sized to your flowering limit, not your total plant limit.
- Seed type: feminized seeds waste fewer plant slots when your count is tight. Regular seeds can produce males you must remove.
- Photoperiod or autoflower: autoflowers let you stagger harvests under a fixed plant count, which matters in low limit states.
- Medical registration: a patient card raises the limit in some states and changes nothing in others, so check before you buy.
- Local rules: city ordinances, HOA terms, and rental leases can be tighter than state law and are enforced separately.
- Tagging and registry: a few states require plant tags or registration, so ask about paperwork when you buy.
Typical plant counts by state
The bands below reflect commonly cited limits for adults 21 and older or for registered medical patients. Rules change, sometimes in the middle of a legislative session, so confirm with your state cannabis regulator before you place an order.
Household caps around 12 plants
- Arizona: 6 per person, 12 per household, grown in a secured area.
- Alaska: 6 per person, 12 per household, with limits on mature plants.
- Colorado: 6 per person, 12 per household, with medical allowances that can run higher.
- Massachusetts: 6 per person, 12 per household.
- Michigan: 12 per household for adult use.
- Nevada: 6 per person, 12 per household.
- New Mexico: 6 mature per person, 12 per household.
- New York: 3 mature and 3 immature per person, 12 per household.
- Ohio: 6 per person, 12 per household.
- Connecticut and Rhode Island: 3 mature and 3 immature per person, 12 per household.
- Maine: 6 mature per person, 12 mature per household, plus seedlings.
- Washington, D.C.: 6 per person, 3 mature, 12 per household.
- Minnesota: 8 per person, 16 per household, with a flowering plant sublimit.
Six plants or fewer
- California: 6 per private residence for adult use, with higher medical allowances by recommendation.
- Missouri: 6 per person with a mature plant sublimit.
- Oklahoma (medical): 6 mature plus 6 seedlings per licensed patient.
- Hawaii (medical): up to 10 plants for registered patients.
- Illinois (medical): 5 plants for qualifying patients.
- Washington (medical): cultivation allowed for authorized patients, commonly 6 plants.
Four plants or fewer
- Virginia: 4 per household.
- Oregon: 4 per household for adult use, with higher medical limits.
- Maryland: 2 per person, 4 per household.
- Montana: 4 mature per person, 8 per household.
- Vermont: 2 mature and 4 immature per person.
States with no legal home grow
Several adult use states, including New Jersey and Delaware, still prohibit home cultivation. A longer list of states, among them Pennsylvania, Florida, Texas, Georgia, and Utah, allow no recreational home grow and limited or no medical cultivation. If you live in one of these states, buying seeds for a home garden is not a legal purchase regardless of where the seller ships from.
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Pitfalls that cost growers money
- Buying for the household cap when only one adult lives at the address.
- Treating rooted clones as free plants. Most states count every rooted plant, clone or not.
- Ignoring the flowering sublimit and ending up with more mature plants than the law allows.
- Assuming a medical card adds plants. In several states it adds nothing.
- Crossing state lines with seeds or plants, which remains federally illegal.
- Forgetting landlord approval, which can void your grow even when state law allows it.
FAQ
Can I grow more plants with a medical card?
Sometimes. States such as Colorado, California, and Oregon give registered patients higher limits, while others keep the same cap or ban home grow entirely. Verify with the state medical program before you buy.
Do seedlings count toward the plant limit?
Often they do once they are rooted, and some states provide a separate seedling allowance. Read the definition of a plant in your state code, because it decides how many seeds you can start at one time.
Can two adults in one home each grow six plants?
That depends on the household cap. In a 6 per person, 12 per household state, yes. In a state with a flat household limit, no, the household number controls.
Does the plant limit restrict how many seeds I can buy?
Plant counts apply to growing plants rather than to sealed seed packs, but seed possession limits and shipping rules vary by state. Buy only the genetics you can legally grow in the current season.
What happens if I exceed the limit?
Penalties range from civil fines and plant seizure to criminal charges, and they scale with plant count in most states. Local enforcement and landlord action can add separate consequences.