Germination Guide

Click on a species name below to see it's germination tips.
Search for a genus or species by entering specific words or parts of words.
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Thermopsis mollis

A

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

1

Resents transplanting.

6

Requires scarification. Nick or rub between sheets of sandpaper.  See https://youtu.be/icB9HrqdQqU  Seed coat of Baptisia and Oxytropis and other Fabaceae can be scarified by soaking in boiling water. See http://botanicallyinclined.org/continuing-the-sowing-in-hot-water

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking. See https://youtu.be/dhL57pqnHHQ

*

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

*

This species needs special care as described.

1

Resents transplanting.

6

Requires scarification. Nick or rub between sheets of sandpaper.  See https://youtu.be/icB9HrqdQqU  Seed coat of Baptisia and Oxytropis and other Fabaceae can be scarified by soaking in boiling water. See http://botanicallyinclined.org/continuing-the-sowing-in-hot-water

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking. See https://youtu.be/dhL57pqnHHQ

A

Sow @ 20°C. Seed germinates within 3 months.
tiny seed should be scarified with sandpaper
Thermopsis smithiana

!

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.

1

Resents transplanting.

6

Requires scarification. Nick or rub between sheets of sandpaper.  See https://youtu.be/icB9HrqdQqU  Seed coat of Baptisia and Oxytropis and other Fabaceae can be scarified by soaking in boiling water. See http://botanicallyinclined.org/continuing-the-sowing-in-hot-water

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking. See https://youtu.be/dhL57pqnHHQ

A

Sow @ 20°C. Seed germinates within 3 months.
tiny seed should be scarified with sandpaper
Thermopsis villosa

*

This species needs special care as described.

1

Resents transplanting.

6

Requires scarification. Nick or rub between sheets of sandpaper.  See https://youtu.be/icB9HrqdQqU  Seed coat of Baptisia and Oxytropis and other Fabaceae can be scarified by soaking in boiling water. See http://botanicallyinclined.org/continuing-the-sowing-in-hot-water

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking. See https://youtu.be/dhL57pqnHHQ

A

Sow @ 20°C. Seed germinates within 3 months.
tiny seed should be scarified with sandpaper, pot deeply; protect from damping off
Thlaspi arvense

A

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

A

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

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Thuja occidentalis 'Nigra'

2

Requires darkness.

A

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

J

Sow @4°C for 3 weeks, then place @20°C.
Thuja occidentalis

A

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

2

Requires darkness.
Thymophylla tenuiloba

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.
Thymus leucotrichus subsp. neiceffii

A

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

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Thymus serpyllum v. albus

A

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

*

This species needs special care as described.
most interbreed and seed may not be what is labelled
Thymus tiflisiensis

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...

A

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

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
requires smoke to germinate
Tiarella 'Black Snowflake'

!

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.
Tiarella 'Cygnet'

A

Sow @ 20°C. Seed germinates within 3 months.
Tiarella 'Iron Butterfly'

!

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.
Tiarella 'Spanish Cross'

!

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.
Tiarella 'Spring Symphony'

!

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.
Tiarella cordifolia

!

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.

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...
germination unlikely after dry storage > 6 months
Tiarella cordifolia 'Dunvegan'

!

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.

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...
germination unlikely after dry storage > 6 months
Tiarella cordifolia 'Iron Cross'

!

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.
Tiarella hybrid

!

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.

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.
Tiarella polyphylla

!

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.

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.
Tiarella sp.

!

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.

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.
Tiarella trifoliata v. trifoliata

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.
Tiarella unifoliata

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.
Tiarella wherryi

!

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.

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...
Tibouchina sp.

?

We have incomplete 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.

A

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

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...
Tigridia pavonia

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.
Tinantia erecta

A

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

6

Requires scarification. Nick or rub between sheets of sandpaper.  See https://youtu.be/icB9HrqdQqU  Seed coat of Baptisia and Oxytropis and other Fabaceae can be scarified by soaking in boiling water. See http://botanicallyinclined.org/continuing-the-sowing-in-hot-water

Titanopsis calcarea

A

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

A

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

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...
Tithonia rotundifolia 'Torch'

A

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

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...
Tithonia sp.

A

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

B

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

B

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

A

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

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking. See https://youtu.be/dhL57pqnHHQ

A

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

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Townsendia eximia x grandiflora

A

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

A

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

A

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