Trillium simile

Germination Tips


Sow immediately. The viability of these seeds is short or the species propagates best with fresh seed. Stored seed might be coaxed into germination with temperature cycling and patience.


This species needs special care as described.


Give sown seeds several weeks @ 20°C to imbibe water (perhaps even germinate!), then expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring. See

Special Care: 
Seeds must be stored cold and moist. Germination is unlikely after storage >6 months. If seeds are received dry, try hydrating in damp paper towel @ 20°C for 1 week. During 3 months @ 20° a radicle is formed. Then 4°C for at least 86 days will trigger emergence of a cotyledon which will appear as the temperature increases in spring. No more leaves are formed that year. If sown early enough, a cotyledon may emerge first spring but usually not until second spring. Keep seeds in pots for 2 years
Most of the seeds in our Germination Guide have been offered from time to time in our annual Seed Exchange (Seedex).