Trillium

Trillium albidum

Germination Tips

*

This species needs special care as described.

2

Requires darkness.

D

Use repeated cycles of 20°C, then 4°C for 3 months each. Germination is very prolonged.
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

Trillium cernuum

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.
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

Trillium cuneatum

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.
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

Trillium erectum

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.

4

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

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

Trillium erectum v. album

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.

4

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

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

Trillium erectum v. blandum

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.

4

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

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

Trillium erectum v. declinatum

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.

4

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

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

Trillium flexipes

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.

4

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

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

Trillium grandiflorum

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.

4

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

Special Care: 
seeds must be stored cold and moist; germination unlikely after storage >6 months; if seeds are received dry, try hydrating in damp paper towel @ 20°C for 1 week; first need 20°C during which a radicle is formed, then cold (4° C) for at least 86 days to trigger emergence of cotyledon which will appear when temperature increases in spring (no further leaves are formed that year); if sown early enough, cotyledon will emerge next spring but usually not until second spring; keep seeds in pots for 2 years

Trillium kurabayashii

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.

4

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

Special Care: 
seeds must be stored cold and moist; germination unlikely after storage >6 months; if seeds are received dry, try hydrating in damp paper towel @ 20C for 1 week; first need 20 C during which a radicle is formed, then cold (4C) for at least 86 days to trigger emergence of cotyledon which will appear when temperature increases in spring (no further leaves are formed that year); if sown early enough, cotyledon will emerge next spring but usually not until second spring; keep seeds in pots for 2 years. Although hardy to zone 6, plant appears very early in spring and gets frost damage. Keep covered with evergreen boughs until frost is past.

Trillium luteum

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.

4

Special Care: 
week; first need 20°C during which a radicle is formed, then cold (4C) for at least 86 days to trigger emergence of cotyledon which will appear when temperature increases in spring (no further leaves are formed that year); if sown early enough, cotyledon will emerge next spring but usually not until second spring; keep seeds in pots for 2 years

Trillium nivale

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.

4

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

Special Care: 
seeds must be stored cold and moist; germination unlikely after storage >6 months; if seeds are received dry, try hydrating in damp paper towel @ 20°C for 1 week; first need 20°C during which a radicle is formed, then cold (4C) for at least 86 days to trigger emergence of cotyledon which will appear when temperature increases in spring (no further leaves are formed that year); if sown early enough, cotyledon will emerge next spring but usually not until second spring; keep seeds in pots for 2 years

Trillium recurvatum

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.

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

Special Care: 
week; first need 20°C during which a radicle is formed, then cold (4C) for at least 86 days to trigger emergence of cotyledon which will appear when temperature increases in spring (no further leaves are formed that year); if sown early enough, cotyledon will emerge next spring but usually not until second spring; keep seeds in pots for 2 years

Trillium rivale

Germination Tips

H

Use repeated cycles of 4°C, then 20°C for 3 months each. Germination is very prolonged.
Special Care: 
tolerates dry storage

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.

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

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

Trillium sp.

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.

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

Special Care: 
Seeds must be stored cold and moist. Germination unlikely after storage for more than 6 months. If seeds are received dry, try hydrating in damp paper towel @ 20°C for 1 week. Trilliums first need 20°C during which a radicle is formed, then cold (4°C) for at least 86 days to trigger the emergence of the cotyledon which will appear when temperature increases in spring. No more leaves are formed that year. If sown early enough, the cotyledon will emerge in the first spring; otherwise usually not until second spring. Keep seeds in pots for 2 years Göte Svanholm (Mid-Sweden) provides this advice: Trillium seeds do not survive dry storage. Trillium will need a first warm (20°) period during which a radicle is formed. Then a cold period (0-4°) to trigger emergence of cotyledon which will appear when temperature increases in spring. No further leaves are formed that year. If sown outdoors early enough, cotyledon will emerge next spring but usually it will not happen until second spring. This applies to those naturally growing in areas with real winters and not to (Pseudo)trilium rivale. The easiest way is to push the berry into the ground beside the parent plant.

Trillium undulatum

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.

2

Requires darkness.

4

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

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

Trillium vaseyi

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.

L

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 https://www.youtube.com/watch?v=SO_KKbGYTEM

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
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