Germination Guide

Click on a species name below to see it's germination tips.
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Astrantia major ssp. involucrata 'Shaggy'

!

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.

2

Requires darkness.

H

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

H

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

2

Requires darkness.
Astrantia maxima 'Alba'

H

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

2

Requires darkness.
Astrantia 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.

H

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

2

Requires darkness.
Asyneuma limonifolium

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

Asyneuma limonifolium

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

Athamanta 'Denver Lace'

?

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.
Athamanta turbith

A

Sow @ 20°C. Seed germinates within 3 months.
Athamanta turbith ssp. haynaldii

A

Sow @ 20°C. Seed germinates within 3 months.
Athyrium filix-femina 'Victoriae'

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
pour boiling water over milled sphagnum moss, sow seeds, enclose in plastic bag
Athyrium niponicum

A

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

*

This species needs special care as described.
pour boiling water over milled sphagnum moss, sow seeds, enclose in plastic bag
Atragene ochotensis

D

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

9

At one time, we advised "Tails may inhibit germination. Remove them." The advice applied primarily to pulsatillas and clematises. Our most recent data indicates that leaving the tails on has no effect on germination.
Atraphaxis sp.

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

Atriplex 'Red Flash'

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Atriplex hortensis v. rubra

A

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

4

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

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

Aubrieta 'Blue Cascade' (Cascade Series)

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Aubrieta deltoidea 'Nana Variegata'

A

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

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.
Aubrieta intermedia

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...
Aubrieta 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...
Aubrieta macedonica

A

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

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...
Aubrieta pinardii

A

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

A

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

A

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

!

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.

G

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Aurinia saxatilis 'Carpet of Gold'

A

Sow @ 20°C. Seed germinates within 3 months.
Aurinia saxatilis 'Citrina'

A

Sow @ 20°C. Seed germinates within 3 months.
Aurinia saxatilis 'Compacta'

A

Sow @ 20°C. Seed germinates within 3 months.
Azalea 'Boudoir'

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
sprinkle seed on 10 cm damp sphagnum moss; cover with clear plastic pop bottle cut in half; transplant seedling to acid mix in shade outdoors when 5 cm high; protect from rodents and give protection in cold frame first winter
Azalea 'Phyllis Moore'

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
sprinkle seed on 10 cm damp sphagnum moss; cover with clear plastic pop bottle cut in half; transplant seedling to acid mix in shade outdoors when 5 cm high; protect from rodents and give protection in cold frame first winter
Azalea 'Sandra Hinton'

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
sprinkle seed on 10 cm damp sphagnum moss; cover with clear plastic pop bottle cut in half; transplant seedling to acid mix in shade outdoors when 5 cm high; protect from rodents and give protection in cold frame first winter
Azalea Ghent hybrid

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
sprinkle seed on 10 cm damp sphagnum moss; cover with clear plastic pop bottle cut in half; transplant seedling to acid mix in shade outdoors when 5 cm high; protect from rodents and give protection in cold frame first winter
Azalea kiusianum 'Komo Kulshan'

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
sprinkle seed on 10 cm damp sphagnum moss; cover with clear plastic pop bottle cut in half; transplant seedling to acid mix in shade outdoors when 5 cm high; protect from rodents and give protection in cold frame first winter
Azalea Mollis hybrid

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
sprinkle seed on 10 cm damp sphagnum moss; cover with clear plastic pop bottle cut in half; transplant seedling to acid mix in shade outdoors when 5 cm high; protect from rodents and give protection in cold frame first winter
Azalea sp.

A

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

*

This species needs special care as described.
sprinkle seed on 10 cm damp sphagnum moss; cover with clear plastic pop bottle cut in half; transplant seedling to acid mix in shade outdoors when 5 cm high; protect from rodents and give protection in cold frame first winter