Feminized vs Autoflower vs Regular Seeds: Which to Buy in Canada

Last updated: October 2026

Every strain in a seed catalogue comes in up to three forms, and the form you pick decides more about your grow than the strain name does. It sets how long the plant takes, how big it gets, whether you need to control the light, and whether some of your plants will turn out to be males you have to remove.

This guide compares feminized, autoflowering and regular seeds side by side, then works through the Canadian factors that tilt the choice: the four-plant household limit, short outdoor seasons on the Prairies and in the North, wet autumns on the coast, and small indoor spaces in city apartments. It ends with a quick decision guide so you can pick a seed type in under a minute.

What is the difference between feminized, autoflower and regular seeds?

The difference is in two traits: sex and what triggers flowering. Feminized seeds are bred to grow only female plants, the ones that produce buds, and they flower when the nights get longer. Autoflowering seeds flower on their own after a set number of weeks, whatever the light. Regular seeds are the natural kind, giving roughly half male and half female plants, and they also flower when nights lengthen.

• Feminized (photoperiod). Close to every plant is female. The plant stays in vegetative growth as long as it gets 18 or more hours of light, and switches to flowering when it gets 12 hours of darkness, indoors on a timer or outdoors as summer turns to autumn.
• Autoflowering. These carry genes from ruderalis, a hardy cannabis from northern Russia and Central Asia, crossed into popular strains. They start flowering three to five weeks after sprouting and are usually ready 9 to 12 weeks from seed. Almost all autoflowers sold today are also feminized.
• Regular (photoperiod). Untreated seeds straight from a male and female parent. You cannot tell males from females until pre-flowers appear, usually four to six weeks into growth.

A fourth option sits between the first two. Fast version seeds are feminized photoperiods crossed with an autoflower, so they still need longer nights to flower but finish one to two weeks sooner than the original strain.

Feminized vs autoflower vs regular: how do they compare?

Feminized seeds lead on yield and flexibility, autoflowers lead on speed and simplicity, and regular seeds lead only for breeding. The table puts the main differences in one place.

Are feminized or autoflower seeds better?

Neither is better across the board: feminized seeds are better when you want the largest harvest from each plant, and autoflowers are better when time, space or simplicity matter more. Because Canadians can only grow four plants per household, yield per plant carries more weight here than in places where you can add more plants.

When feminized seeds win

A feminized photoperiod plant keeps growing for as long as you leave it in veg, so you can build a plant that fills a whole tent. With four to eight weeks of veg and some training, indoor plants commonly give 100 to 200 g of dried flower each, and an outdoor plant with a full Canadian summer can give 400 g or more. You also get the full range of strains, including the newest dessert and gas crosses, which often reach the market as feminized photoperiods long before an autoflower version exists.

When autoflowers win

Autoflowers finish fast and forgive mistakes in light timing. Indoors, you can run them under 18 or 20 hours of light from start to finish, so a light leak from a hallway or a timer that fails for a night will not ruin the crop. They stay small, usually 50 to 120 cm, which suits closets, small tents and balconies. Expect 30 to 150 g per plant indoors, depending on the strain and the light. If you are new to growing, read our autoflower growing guide before you start, because the short life cycle leaves little time to recover from early mistakes.

Are autoflowers less potent?

Not by much any more. Early autoflowers were noticeably weaker, but modern lines bred over many generations regularly reach the low to mid 20s for THC. The strongest results still tend to come from photoperiod plants, simply because the newest high-THC strains are released as feminized seeds first.

When should you buy regular seeds?

Buy regular seeds when you want males: to make your own seeds, to cross two strains, or to hunt through a large number of plants for one outstanding female to keep as a mother. For a home grower who just wants buds, they are the least efficient option in Canada.

The reason is the four-plant limit. Every regular seedling counts as one of your four plants until you identify and remove the males, which usually takes four to six weeks. With a roughly 50/50 split, four regular seeds will on average give you two females, and you will have spent a month or more of space, light and nutrients on plants you throw away. Health Canada sets out the household limit and other home-grow rules on its Cannabis Act laws and regulations page, and our guide to how many cannabis plants you can grow in Canada covers the rules province by province.

Many breeders value regular seeds because they come from untouched male and female parents. If you have the space and the patience, and your province allows home growing, they are the right tool for making seeds of your own.

Which seed type suits your part of Canada?

Your region decides which seed types can finish outdoors: feminized photoperiods suit the BC coast, the Okanagan and southern Ontario, while autoflowers and fast versions make outdoor growing possible on the Prairies, in the North and in much of Atlantic Canada.

Indoors, where you control the season, all three types work anywhere in the country. The choice then comes down to space, time and how hands-on you want to be.

Which seed type is best for beginners?

For most beginners in Canada, feminized seeds of an easy, forgiving strain are the best start, with autoflowers a close second for anyone growing in a closet, a small tent or a balcony. Regular seeds are the hardest first choice, because sexing plants is an extra skill to learn.

Feminized plants give you time. If something goes wrong in week three, a photoperiod plant can stay in veg until it recovers, while an autoflower keeps to its clock and finishes smaller. On the other hand, autoflowers need no light schedule changes and are ready sooner, which keeps a first grow short and motivating.

1. Want the most from four plants and have a tent at least 120 cm tall? Choose feminized.
2. Have less than 100 cm of height, a balcony, or a light leak you cannot fix? Choose autoflower.
3. Growing outdoors on the Prairies, in the Maritimes or in the North? Choose autoflower or fast version.
4. Want a harvest before the coastal rain or two outdoor harvests in one summer? Choose autoflower.
5. Want to make your own seeds or keep a mother plant from a big pheno hunt? Choose regular.

How much do feminized seeds cost per seed?

Feminized seeds at MJ Seeds Canada cost $65 for 5, $120 for 10 and $240 for 25, which works out to $13, $12 and $9.60 per seed before any promotion. Because every 10 and 25 seed pack is buy one get one free, a second pack of the same size, of any strain, brings the effective cost of a 10 pack down to $6 per seed.

For a four-plant household, a 5 or 10 pack is usually plenty: it covers a germination loss or two and leaves seeds for a second run. Seeds keep for years stored cool, dark and dry, so a larger pack is not wasted. Every pack is covered by our 80% germination guarantee when you follow the cup of water and paper towel method.

One seed of each type to start with

• White Widow Feminized: a forgiving feminized classic that finishes in about 8 to 10 weeks of flower and handles beginner mistakes well.
• Northern Lights Autoflowering: a compact, fast autoflower for balconies, closets and short northern summers.
• Big Bud Fast Version: a heavy-yielding photoperiod that finishes sooner than the original, useful where frost comes early.

Frequently asked questions

Are autoflower seeds always female?

No, but almost all autoflowers sold today are feminized, so close to every plant is female. Regular autoflower seeds also exist and give roughly half males. Check that a pack says feminized autoflower if you only want bud-producing plants.

Is feminized or autoflower better for beginners?

Both work for beginners. Feminized seeds give more room to recover from mistakes and a bigger harvest, while autoflowers are faster, smaller and need no light schedule changes. Choose autoflowers for very small spaces and feminized seeds when you have a tent at least 120 cm tall.

What is the difference between autoflower and regular seeds?

Autoflower seeds flower automatically after a few weeks, whatever the light, and are usually feminized. Regular seeds are photoperiod plants that flower when nights reach 12 hours, and they produce roughly half male plants that need to be removed before they pollinate the females.

How long do autoflowers take to grow?

Most autoflowers take 9 to 12 weeks from sprouting to harvest, and some larger strains take up to 14 weeks. They usually start flowering three to five weeks after germination, whatever the light schedule.

Can you grow autoflower and feminized plants together?

Yes, but it is easiest outdoors or in separate spaces. Indoors, a shared tent must stay on 12/12 once the photoperiods flower, which slows the autoflowers. Outdoors in Canada, both grow side by side and simply finish at different times.

Every seed we sell is already in Canada and ships from Vancouver in plain packaging, arriving in 3 to 7 business days. Compare strains across all three types, starting with our feminized seeds.