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Germination is the single highest-stakes step of a grow — a seed that fails to pop is a strain you never get to grow. The good news is that with fresh seeds and a careful first 72 hours, success rates of 90%+ are routine. This guide covers the three reliable methods, the conditions seeds need to sprout, and the small mistakes that cost growers their first batch. Every strain in our catalog is backed by a 90% germination guarantee — if seeds fail using a proper method, we replace them.
Lay two sheets of clean paper towel on a dinner plate. Moisten them with distilled or filtered room-temperature water — wet enough that water doesn't pool when you press, but not so wet that they're dripping. Place your seeds an inch apart on one sheet, cover with the second, and slide the plate inside a second inverted plate to trap humidity and block light. Set somewhere warm and dark — 70-80°F is the target.
Check every 12 hours. The paper towel should stay moist; re-mist if it's drying. You'll see a small white taproot emerge from one end of the seed in 24-96 hours. The seed is ready to plant once the taproot is between a quarter inch and half an inch long. Handle by the seed shell, never by the root.
Fill a glass with room-temperature distilled water and drop the seeds in. Viable seeds sink within a few hours; floaters can be coaxed under by gently tapping the surface. Soak for 12-18 hours — long enough to soften the shell and trigger germination signals, short enough that seeds don't drown from lack of oxygen.
After the soak, move seeds to the paper towel method or directly into soil. Many breeders skip the soak entirely and go straight to paper towel, which works fine — the soak just shortens the paper-towel phase by a day or so.
Plant seeds 0.25 to 0.5 inches deep in light, pre-moistened seedling mix. Cover gently, mist the surface so you don't displace the seed, and keep the soil warm (70-80°F) and lightly moist. A clear plastic dome over the pot traps humidity and speeds germination.
Direct soil is the least invasive method — no transplant shock — but you can't verify germination until the seedling breaks the surface 5-10 days later. Most growers use paper towel first because the visual confirmation removes the guesswork.
Once the taproot is half an inch long, transplant taproot-down into a small pot of pre-moistened seedling mix at 0.25 to 0.5 inches deep. Keep the soil warm and lightly moist; never let it dry out completely in the first week. Provide gentle light — a CFL or low-output LED 18-24 inches above the soil is enough. Full-strength lights and nutrients can wait until the first true leaves appear.
The first leaves you see are cotyledons — round, smooth, paired. They aren't true leaves. True leaves appear next, with the recognizable serrated cannabis shape. Once you see the first true leaf pair, the seedling is established and you can begin a mild nutrient regime.
Most viable cannabis seeds germinate in 24 to 96 hours using the paper towel method. Fresh, properly stored seeds usually pop within 48 hours; older seeds (over 2 years) can take 4-7 days. If a seed hasn't sprouted in 10 days, it's almost certainly not going to.
The paper towel method has the highest success rate for home growers — it lets you verify germination before planting and protects the fragile taproot. Soak seeds in water for 12-18 hours first, then place them between two moist (not wet) paper towels on a plate, in a dark space at 70-80°F. Check daily.
Yes, for most seeds. A 12-18 hour soak in clean room-temperature water softens the seed shell and triggers germination signals. Don't soak longer than 24 hours — seeds need oxygen and prolonged soaking can drown them. Mature, dark-colored, hard-shelled seeds benefit most from soaking.
70-80°F (21-27°C) is the ideal range. Below 65°F germination slows dramatically; above 85°F seeds can dry out or be damaged. A seedling heat mat under your germination plate solves cold-room problems and shortens germination time by 24-48 hours.
The four most common reasons: (1) seeds are too old or were stored in heat/light, (2) the paper towel dried out, (3) ambient temperature is below 65°F, (4) the seeds got handled too roughly and the embryo was damaged. Our 90% germination guarantee covers genuine seed failures — if a seed doesn't pop after 10 days using a proper method, we replace it.
Distilled or filtered room-temperature water is best — chlorinated tap water can kill the delicate embryo if used directly. If you only have tap water, let it sit uncovered for 24 hours so the chlorine evaporates before using it for germination.
Plant the seed taproot-down (white root pointing toward the floor) at 0.25 to 0.5 inches deep — about a fingernail's depth. Cover gently with soil, water with a spray bottle so you don't displace it, and keep the soil moist but not soaked until the seedling breaks the surface in 1-3 days.
If you follow a proper method and seeds still fail to pop within 10 days, we replace them. Photo evidence of the failed batch and order number are all we need. Contact support to start a replacement.