Germination Guide

Click on a species name below to see it's germination tips.
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Teucrium flavum grandiflorum

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Teucrium halacsyanum

A

Sow @ 20°C. Seed germinates within 3 months.
Teucrium hyrcanicum

A

Sow @ 20°C. Seed germinates within 3 months.
Teucrium hyrcanicum atropurpureum

E

Sow @ 20°C for 6 weeks, then place @ 4°C for 6 weeks, then slowly raise temperature to 10°C for 6 weeks. If there is no germination, repeat the cycle. This mimics fall sowing outdoors for spring germination.
Teucrium montanum

F

Sow @ 4°C.
Teucrium rotundifolium

A

Sow @ 20°C. Seed germinates within 3 months.
Teucrium scorodonia

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Teucrium subspinosum

G

Sow @ 4°C for 3 months, then place @ 20°C for 3 months.
Teucrium webbianum

A

Sow @ 20°C. Seed germinates within 3 months.
Teucrium x lucidrys

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum aquilegifolium 'Sparkler'

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum aquilegifolium v. intermedium
Thalictrum lucidum

*

This species needs special care as described.
20°x 4 weeks, 4°C x 6 weeks, then 20°C
Thalictrum actaeifolium

K

Sow @ 10°C. Most species for which we suggest this temperature will also germinate at 20°C, but prefer the cooler temperature for sturdy growth.
Thalictrum alpinum

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum aquilegifolium

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum aquilegifolium 'Album'

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum aquilegiifolium

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum aquilegiifolium purpureum

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum aquilegiifolium v. album

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum baicalense

L

Expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring.
Thalictrum chelidonii

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Thalictrum dasycarpum

H

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

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum dipterocarpum

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Thalictrum filamentosum

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum flavum

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Thalictrum flavum 'Illuminator'

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Thalictrum flavum glaucum

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Thalictrum flavum ssp. glaucum

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Thalictrum foetidum

K

Sow @ 10°C. Most species for which we suggest this temperature will also germinate at 20°C, but prefer the cooler temperature for sturdy growth.
Thalictrum isopyroides

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum minus

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Thalictrum minus 'Adiantifolium'

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Thalictrum polygamum

!

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.
Thalictrum pubescens

A

Sow @ 20°C. Seed germinates within 3 months.
Thalictrum rochebrunianum

L

Expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring.

4

Germination is improved by using GA3.
Thalictrum rochebrunianum 'Lavender Mist'

L

Expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring.

4

Germination is improved by using GA3.
Thalictrum simplex minus

A

Sow @ 20°C. Seed germinates within 3 months.

3

Requires light or the small seeds should be surface sown.
Thalictrum simplex ssp. galioides

A

Sow @ 20°C. Seed germinates within 3 months.

3

Requires light or the small seeds should be surface sown.
Thalictrum sp.

A

Sow @ 20°C. Seed germinates within 3 months.

5

Germination is successful only when GA3 is used.
seed viability < 1 year
Thalictrum speciosissimum

F

Sow @ 4°C.
Thalictrum uchiyamae

G

Sow @ 4°C for 3 months, then place @ 20°C for 3 months.
Thalictrum glaucum

?

We have no information on the germination of this species. Sometimes we offer an educated guess about which approach you could try. Let us know what is successful.
Thelesperma burridgeanum 'Phillipine'

K

Sow @ 10°C. Most species for which we suggest this temperature will also germinate at 20°C, but prefer the cooler temperature for sturdy growth.

N

Sow directly in garden.
Thermopsis caroliniana

!

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.

A

Sow @ 20°C. Seed germinates within 3 months.

1

Resents transplanting.

6

Requires scarification. Nick or rub between sheets of sandpaper.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.

*

This species needs special care as described.
tiny seed should be scarified with sandpaper
Thermopsis lanceolata

!

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.

A

Sow @ 20°C. Seed germinates within 3 months.

1

Resents transplanting.

6

Requires scarification. Nick or rub between sheets of sandpaper.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.

*

This species needs special care as described.
tiny seed should be scarified with sandpaper
Thermopsis lupinoides

A

Sow @ 20°C. Seed germinates within 3 months.

1

Resents transplanting.

6

Requires scarification. Nick or rub between sheets of sandpaper.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.

*

This species needs special care as described.
pot deeply; protect from damping off
Thermopsis mollis

A

Sow @ 20°C. Seed germinates within 3 months.

1

Resents transplanting.

6

Requires scarification. Nick or rub between sheets of sandpaper.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.

*

This species needs special care as described.
tiny seed should be scarified with sandpaper
Thermopsis montana

A

Sow @ 20°C. Seed germinates within 3 months.

1

Resents transplanting.

6

Requires scarification. Nick or rub between sheets of sandpaper.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.
Thermopsis smithii

J

Sow @4°C for 3 weeks, then place @20°C.
Thermopsis villosa

A

Sow @ 20°C. Seed germinates within 3 months.

1

Resents transplanting.

6

Requires scarification. Nick or rub between sheets of sandpaper.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.

*

This species needs special care as described.
pot deeply; protect from damping off
Thlaspi alpestre

A

Sow @ 20°C. Seed germinates within 3 months.
Thlaspi alpinum

A

Sow @ 20°C. Seed germinates within 3 months.
Thlaspi bellidifolium

A

Sow @ 20°C. Seed germinates within 3 months.
Thlaspi bulbosum

A

Sow @ 20°C. Seed germinates within 3 months.
Thlaspi caerulescens

A

Sow @ 20°C. Seed germinates within 3 months.
Thlaspi crassum

A

Sow @ 20°C. Seed germinates within 3 months.
Thlaspi montanum

A

Sow @ 20°C. Seed germinates within 3 months.
Thlaspi praecox

F

Sow @ 4°C.