Answer
Feminized cannabis seeds germinate at 85% to 95% per lot when the seed is fresh and stored well. The feminization step does not lower that range by itself. A seed fails for the same reasons a regular seed fails: age, heat, drying, or a damaged embryo.
What the 85% to 95% figure covers
Germination rate is the share of seeds in a sample that produce a normal seedling. Breeders test a lot by counting 100 seeds and recording how many sprout. Seed banks list 90% or higher on fresh stock. Retail packs sit in transit and on shelves for months, so a realistic number for a pack bought at a store is 80% to 90%.
Feminized Seeds Price: What You Pay For and What to Skip
Feminized compared to regular
Feminized seeds come from a female plant treated with silver thiosulfate or colloidal silver. The plant produces pollen with no Y chromosome. Seeds from that cross carry two X chromosomes, so about 99% grow into female plants. Regular seeds produce male and female plants at about a 50/50 split.
Feminization is a breeding method, not a germination treatment. The embryo and the seed coat form the same way. Parent plants under silver treatment carry more stress and set fewer seeds, and those seeds weigh less. Light seeds germinate slower and produce smaller seedlings. This is a seed-quality effect, not a property of feminized genetics. No replicated trial has compared germination rates of feminized and regular seeds from the same mother line. The size of any difference is unknown.
Timing by method
- Paper towel in a bag: radicle at 24 to 72 hours.
- Soak in water 12 to 24 hours, then plant: radicle at 24 to 96 hours.
- Direct in soil or coco: emergence at 3 to 10 days.
- Rockwool cubes: emergence at 2 to 7 days.
Hold the medium at 72 F to 77 F (22 C to 25 C). Below 65 F (18 C) germination slows and mold risk rises. Above 85 F (29 C) the embryo can die.
Storage math
Seed moisture of 5% to 8% plus an airtight container plus dark storage at 39 F to 46 F (4 C to 8 C) holds viability for several years. A pack kept in a drawer at 70 F loses rate faster. Rough shelf life: 1 year at room temperature, 3 to 5 years refrigerated, longer frozen if the seed stays dry.
How to test your own lot
- Count 20 seeds from the pack.
- Germinate all 20 the same way, at the same temperature.
- Count normal seedlings at day 10.
- Multiply by 5. That is your rate for the lot.
One failed seed in a pack of three tells you nothing. A rate needs a sample.