Cannabis Seeds

Feminized cannabis seeds are bred to produce only female plants, so nearly every seed turns into a bud-producing plant with no males to remove. This gives a higher yield and higher potency than autoflowering seeds, and lets you keep plants in the growing stage longer or raise mother plants. Feminized plants flower on the photoperiod: they grow under 18 hours of light and 6 of darkness, then start flowering in late summer as daylight drops toward 12 hours light and 12 darkness. Buying quality genetics from a reputable seedbank keeps the odds of stray male or hermaphrodite plants low.

Autoflowering cannabis seeds flower automatically after about four weeks of growth, regardless of the light cycle, which makes them the fastest and simplest type to grow. Post-germination they take 8–12 weeks to harvest. One plant can go from seed to bud in under three months. They stay compact and handle cooler, shorter summers well, which is why they suit beginners and growers who want more than one harvest a season. They give a smaller yield than photoperiod plants in exchange for that speed and low maintenance.

Regular cannabis seeds grow into male or female plants the way nature intended, in a roughly 1:1 ratio. Only the females produce smokable bud, which means growers who want buds remove the males before they pollinate the crop. Regular seeds are the choice for breeding your own strain, keeping a genetically untouched phenotype, or developing mother plants. Like feminized plants, they depend on the photoperiod, growing under 18/6 and flowering as daylight drops toward 12/12 in late summer.

No. Feminized refers to the plant's sex, meaning the seed grows a female plant. Autoflowering refers to how the plant flowers, automatically after a few weeks instead of waiting for shorter days. A seed can be feminized without being autoflowering, but most autoflowers are feminized.

The coffee-filter method gives the highest germination rate. Wet two unbleached coffee filters with mineral water at pH 6–7, lay the seeds on one with the pointy end facing down, cover with the second filter, and seal everything in a plastic zip bag. Tape the bag inside a dark, warm cupboard at 20–25 °C and check the moisture daily. Once a root shows, plant the seed root-down about 0.5 cm deep in damp soil with the top of the seedling still visible.

Most seeds sprout within 3 to 7 days using the coffee-filter method in a warm, dark spot at 20–25 °C. Be patient some seeds take more than three weeks, and a slow starter is not a dead seed. As soon as a root is visible, the seed is ready to plant. If no root shows yet, hang the bag back up and keep checking the moisture daily.

Store cannabis seeds cool and dry, ideally in the refrigerator in their original sealed packaging. Dry air, heat, and heat waves kill seeds, so keep them away from warm windowsills and fluctuating temperatures. Before you germinate, let the sealed packet acclimate to room temperature for 48 hours to stop condensation shocking the seeds. Cold, dark, and airtight is the rule.

Stored cool, dark, and dry in the fridge, cannabis seeds stay viable for roughly 3 to 5 years. A fresh batch germinates at well over 90%, and that rate slowly drops the longer the seeds sit, falling to around 70% by year three. Heat, moisture, light, and temperature swings also shorten that lifespan. Keeping them sealed and refrigerated is what protects the germination rate.

Autoflowering cannabis seeds are the easiest to start with. They flower on their own after about four weeks, with no light schedule to manage, they stay compact, and they go from seed to harvest in 8–12 weeks. Hardy autoflower strains resist cooler weather, moisture, and pests better than most, which forgives beginner mistakes. After that feminized seeds are the easiest to grow, since you don’t have to spot and cull plants.

The highest-THC seeds feminized photoperiod strains. Because the plants spend longer in the growing stage before flowering they reach their full potency. Our top picks: HulkBerry , LSD, Pineapple Chunk and Dos Si Dos 33. Autoflowering versions generally run slightly lower in THC, but some high-potency autoflowers come close. If raw strength is the priority, choose feminized photoperiod seeds.

Indoors you control the light, which makes feminized photoperiod seeds a strong pick: you switch the light cycle to 12/12 once the plant reaches the size you want. Compact indica-leaning strains suit a grow tent. Cannabis strains like Northern Lights (Sensi Seeds seed bank) and Critical Kush (Barney’s Farm seed bank) stay short and dense. For very tight spaces, autoflowers our Dwarf Ryder flower on their own under a steady bright light and stay small. Feminized seeds keep every plant productive, with no grow space lost to males.

Feminized photoperiod seeds use the natural drop in daylight to flower and finish in autumn, giving the biggest plants and yields. Autoflowering seeds suit growers who want speed or a second harvest. Sown from mid-to-late May in the Netherlands, they’re ready by mid-August, before the wet autumn raises the risk of mould. For the Dutch climate, Frisian Dew and Hollands Hope (both Dutch Passion cannabis seed bank) are bred for wet, cool, cloudy conditions and resist mould, which makes them the safest outdoor picks.

A good cannabis seed looks dark brown, grey, or black, often but not always with a tiger-stripe pattern, and has a firm, waxy shell that doesn’t crack under light finger pressure. Pale green or white seeds are usually immature, and cracked or crushed ones rarely sprout. Buying from a reputable seedbank with quality genetics matters more than any single visual check.

Order more than the number of plants you want to end up with, because not every seed germinates and not every seedling survives. With feminized or autoflowering seeds, nearly all grow into productive female plants, a small buffer covers the odd seed or two that fails. With regular seeds, plan for roughly half to come out male and get removed, order about double the plants you’re aiming for. A few spare seeds also let you keep the strongest seedlings and store the rest in the fridge for next season.