Germination Guide

Click on a species name below to see it's germination tips.
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Helleborus x hybridus (Party Dress Group)

!

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.

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

D

Use repeated cycles of 20°C, then 4°C for 3 months each. Germination is very prolonged.
dry storage impairs germination
Helleborus x sternii (Blackthorn Group)

!

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.

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

D

Use repeated cycles of 20°C, then 4°C for 3 months each. Germination is very prolonged.
dry storage impairs germination
Helonias bullata

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...
Helonias orientalis

A

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

*

This species needs special care as described.
poor germination
Heloniopsis orientalis

A

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

*

This species needs special care as described.
poor germination
Hemerocallis 'Cherry Ripe'

J

Sow @4°C for 3 weeks, then place @20°C.
Hemerocallis 'Chicago Apache'

A

Sow @ 20°C. Seed germinates within 3 months.
Hemerocallis 'Little Cherub'

A

Sow @ 20°C. Seed germinates within 3 months.
Hemerocallis 'Lucky Kiss'

A

Sow @ 20°C. Seed germinates within 3 months.
Hemerocallis 'Sandy Yudin'

A

Sow @ 20°C. Seed germinates within 3 months.
Hemerocallis 'Siloam Double Classic'

A

Sow @ 20°C. Seed germinates within 3 months.
Hemerocallis 'Siloam Red Ruby'

A

Sow @ 20°C. Seed germinates within 3 months.
Hemerocallis 'Stella de Oro'

A

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

F

Sow @ 4°C.
Hemerocallis hybrid

A

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

F

Sow @ 4°C.
Hemerocallis middendorffii

F

Sow @ 4°C.
Hemerocallis minor

F

Sow @ 4°C.
Hemerocallis sp.

J

Sow @4°C for 3 weeks, then place @20°C.
Hemerocallis tetraploid group

J

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

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
Hemerocallis thunbergii

A

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

!

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.
see http://botanicallyinclined.org/lost-in-translation-updates-on-germination-requirements/
Hepatica americana

!

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.

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.
unlikely to germinate after dry storage; grow seedlings at cool temperature, best accomplished by sowing in open ground; see http://botanicallyinclined.org/hepatica/hepatica-pollination-seeds-germination-2/
Hepatica nobilis

!

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.

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.
unlikely to germinate after dry storage; grow seedlings at cool temperature, best accomplished by sowing in open ground; see http://botanicallyinclined.org/lost-in-translation-updates-on-germination-requirements/
Hepatica nobilis f. rosea

!

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.

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.
unlikely to germinate after dry storage; grow seedlings at cool temperature, best accomplished by sowing in open ground; see http://botanicallyinclined.org/lost-in-translation-updates-on-germination-requirements/
Heptacodium miconioides

!

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.
Heracleum minimum 'Roseum'

A

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

D

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

A

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

N

Sow directly in garden.
Heracleum sphondylium ssp. montanum

A

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

N

Sow directly in garden.
Hermodactylus tuberosus

C

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

2

Requires darkness.
Hesperantha baurii

A

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

*

This species needs special care as described.
do not disturb seedlings for 1 year
Hesperantha coccinea

A

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

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...
Hesperis lutea

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Hesperis matronalis 'Variegata'

A

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

A

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

A

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

A

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

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.
Heterotheca jonesii

A

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

A

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

B

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

A

Sow @ 20°C. Seed germinates within 3 months.
Heuchera villosa v. macrorhiza

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.
Heuchera 'Crispy Curly'

A

Sow @ 20°C. Seed germinates within 3 months.
Heuchera 'Green Ivory'

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Heuchera americana 'Eco-magnififolia'

A

Sow @ 20°C. Seed germinates within 3 months.
Heuchera americana (Dale's Strain)

A

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

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...
Heuchera cylindrica

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...

*

This species needs special care as described.
better germination if seed is stored for 2 years
Heuchera grossulariifolia

A

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

C

Sow @ 20°C for 3 months, then place @ 4°C for 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...
Heuchera hispida var.richardsonii

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.
Heuchera hybrid

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.
Heuchera micrantha

A

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

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...

*

This species needs special care as described.
better germination if seed is stored for 2 years
Heuchera parishii

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...