One of the most confused topics in personal production is how much cannabis you can actually keep at home. People mix up three different numbers: the 30-gram public possession limit, their authorized daily amount, and the harvest a grow can yield. The ACMPR storage limits are tied to your registration, not to a single flat figure — and getting this right matters, because holding far more than your authorization supports is a compliance risk even when your plant count is correct. This guide untangles the ACMPR storage limits, how they relate to possession, and how to stay clearly within them.
Key takeaways
- Your ACMPR storage limits are tied to your authorized amount, not a single fixed number.
- The 30 g public possession limit is separate — it governs what you carry in public.
- Holding a large surplus beyond your authorization is a compliance risk, even with a correct plant count.
- Harvest and store within your limits; do not let inventory pile up.
- A modest, defensible daily amount keeps your storage easy to keep legal.
How much cannabis can you store at home under the ACMPR?
Your home storage is governed by your authorized amount rather than a single universal cap. In practice, the ACMPR storage limits mean you can keep the cannabis your registration reasonably yields for your own medical use — but not accumulate an open-ended stockpile far beyond what you are authorized to produce. The system is built around proportionality: the daily amount on your medical document drives your plant count, and your plant count drives a realistic harvest. As long as what you hold lines up with that chain, you are within the spirit and the letter of the rules. Trouble starts when the amount on hand looks like production for something other than personal use.
How are storage limits different from the possession limit?
This is the distinction that trips most people up. The 30-gram public possession limit is a recreational rule about how much dried cannabis (or its equivalent) you can carry in a public place — it is not a cap on what you grow and keep at home. Your ACMPR storage limits, by contrast, are about home production and are tied to your medical authorization. So you can lawfully have more than 30 grams stored at your registered site from your own harvest, while still being held to the 30-gram limit the moment you carry cannabis in public. Keeping these two ideas separate is essential: one is about the street, the other is about your registered grow.
What happens if you store more than your limit?
Holding a large surplus beyond what your authorization supports turns a lawful grow into a compliance problem, even if your plant count is exactly right. A big stockpile suggests production or accumulation beyond personal medical needs, which is precisely the pattern Health Canada is watching for in the current enforcement climate. It can undermine your standing, complicate any inspection, and in a worst case contribute to a registration being questioned or revoked. The practical safeguard is simple: harvest and store within your limits, and do not let dried cannabis pile up far past what you actually use. If you find yourself with a large surplus, that is usually a sign your authorized amount was higher than your real need.
How does your daily amount set your storage limit?
Everything flows from the daily amount on your medical document. That figure determines your maximum plant count through Health Canada's formula, and the plant count in turn shapes how much cannabis a compliant grow yields and that you can reasonably keep. So your ACMPR storage limits are not a number you choose directly — they are an output of the daily amount you and your practitioner set. This is another reason a defensible, modest amount is easier to live with: it produces a quantity you can realistically store within the rules, while an inflated amount creates a storage and surplus problem on top of the scrutiny it already invites.
Does fresh, dried, and harvested cannabis count differently?
This trips a lot of growers up, because what you can store is expressed in dried-equivalent terms, but a home grow produces cannabis in several forms at once — live plants, freshly harvested wet material, and finished dried flower. Different forms convert to a dried equivalent at different rates, so a large amount of fresh or wet cannabis can represent far more dried-equivalent weight than it appears to at a glance. The practical takeaway is to think in dried-equivalent terms when you assess whether you are within your limit, and to be especially mindful around harvest, when wet material temporarily inflates what you are holding. Drying, trimming, and keeping only what your registration supports — rather than letting harvest surplus accumulate — keeps your real, dried-equivalent total clearly inside the line.
What if you grow more than you can use?
A good harvest can leave you holding more dried cannabis than you will get through quickly, and how you handle that surplus matters. The first principle is to produce to your needs: registering and growing an amount that roughly matches what you actually use avoids the problem at the source, and is also part of keeping your registration defensible. If you do end up with more than expected, the surplus is still your authorized medical cannabis — but it must stay securely stored, and you cannot solve an oversupply by giving it away or selling it, since that crosses into illegal distribution. A very large stockpile sitting around is also exactly the kind of thing that invites questions, even when nothing illegal is happening. The sensible approach is to scale your grow realistically, store what you have properly, and let your next cycle reflect what you learned about your real consumption, rather than steadily accumulating cannabis you do not need.
Do oils, edibles, and extracts count toward your total?
Yes — anything that is cannabis counts, but it is counted in 'dried equivalent' rather than by raw weight. The rules define how much of each form equals a gram of dried cannabis, so an oil, an edible, or an extract converts to a dried-equivalent figure that goes into your total alongside your dried flower. This is easy to overlook: someone focused on the weight of their dried buds may forget that bottles of oil or other products also count, and together they can add up to more than expected. The practical habit is to tally everything you hold in dried-equivalent terms, not just the obvious jar of flower, and to use the conversions on product packaging to do it. For home growers this is especially relevant around harvest, when you may have dried flower plus fresh material plus any products you have made or bought. Keeping a rough running total in dried equivalent is the simplest way to be sure your whole stash, in all its forms, stays within what your authorization supports. A quick note on your phone listing each item and its dried-equivalent weight takes minutes and removes all the guesswork.
How do you keep your storage clearly within the limits?
- Set a defensible daily amount so your authorized production stays modest.
- Harvest and dry only what you can store within your limits — avoid building a surplus.
- Keep cannabis at your registered site, secured and out of public view.
- Track roughly what you hold so you notice if it drifts above your needs.
- Remember the 30 g rule applies only when you carry cannabis in public.