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How Many Cannabis Seeds Should You Buy? (Honest Math)

Buy a 10 seed pack for a four-plant home grow: it covers germination odds and backups, doubles through the buy one get one free promo, and spare seeds store for years in the fridge.

Last updated: August 2026

Seeds are the cheapest part of a grow, and running out mid-season is the most expensive mistake. Here is the honest math we give customers who ask how many to order.

Start from the plant limit

Most provinces allow four plants per household. To finish with four healthy plants you want more than four seeds: some seeds are slow, some seedlings are weak, and thinning to your best four is exactly how experienced growers do it.

The germination math

Viability-tested seeds germinate at high rates, and our germination guarantee covers 80 percent when you follow the germination guide. From a 10 pack, plan on 8 or more sprouts. Pick the strongest four, and keep the rest of the pack for the next run.

What pack size fits which grower

You are Buy Why
First grow, one season 10 seeds Four plants plus backups, second grow included
Two crops a year 2 x 10 (one free) The BOGO pair covers a full year of growing
Trying multiple strains Two different 10 packs Any two same-size packs pair as buy one get one free
Committed grower 25 seeds Lowest cost per seed, free 25 pack included

Stacking the promos

Every 10 and 25 seed pack at MJ Seeds Canada is buy one get one free, mix and match across strains. Orders over $200 ship free, and orders over $420 include 10 bonus seeds. In practice, a single 10 pack purchase puts 20 seeds in your fridge.

Storing what you do not plant

Airtight jar, desiccant packet, back of the fridge. Seeds stored this way stay viable for three to five years or more, so buying ahead costs nothing but saves a spring scramble. When you are ready to choose strains, start with the beginner guide or browse all 600+ strains.

Frequently asked questions

How many seeds should a first-time grower buy?

A 10 seed pack. It covers the four-plant household limit with backups for slow starters and lets you run two grows from one purchase.

Do all seeds germinate?

No seed bank ships 100 percent. Ours are viability tested and covered by an 80 percent germination guarantee, so plan roughly 8 sprouts from a 10 pack and enjoy the extras when you get more.

Is a bigger pack cheaper per seed?

Yes, and the promos stack: every 10 and 25 seed pack is buy one get one free, orders over $200 ship free and orders over $420 add 10 bonus seeds.

How should I store spare seeds?

Cool, dark and dry: an airtight container in the fridge with a desiccant packet keeps seeds viable for years.