Germination Guide

Click on a species name below to see it's germination tips.
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Alchemilla pratensis

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.

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.
outdoors - oscillating temperatures preferred, barely cover
Alchemilla 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.
Alchemilla velebitica

A

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

*

This species needs special care as described.

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.
oscillating temperatures preferred
Alchemilla vulgaris

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.

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.
outdoors - oscillating temperatures preferred, barely cover
Alfredia cernua

A

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

L

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

Aliciella subnuda

L

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

Alisma plantago

!

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.

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
20°C (light), then 4°C, then raise temperature slowly to 20°C (dark), keep seed pot standing in 3 cm of water, remove pericarp and a bit of the seed coat for faster germination
Alisma plantago-aquatica

!

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.

B

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

*

This species needs special care as described.
20°C (light), then 4°C, then raise temperature slowly to 20°C (dark), keep seed pot standing in 3 cm of water
Alisma subcordatum

L

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

6

Requires scarification. Nick or rub between sheets of sandpaper. See https://youtu.be/icB9HrqdQqU

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.
bog plant; stand pot in 3 cm water
Allium ampeloprasum

A

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

L

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

Allium baissunense

?

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.

L

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

Allium cardiostemon 'Purple Gem'

?

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.

L

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

Allium cernuum v. obtusum

A

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

?

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.

L

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

Allium paczoskianum

?

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.

L

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

Allium sacculiferum

A

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

?

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.

L

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

Allium senescens 'Blue Eddy'

G

Sow @ 4°C for 3 months, then place @ 20°C for 3 months.
Allium senescens ssp.glaucum

G

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

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Allium stipitatum 'Mount Everest'

F

Sow @ 4°C.
Allium victorialis var. platyphyllum

!

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.
Allium 'Globemaster'

J

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

B

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

?

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.

L

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

Allium 'Mount Everest'

J

Sow @4°C for 3 weeks, then place @20°C.
Allium 'Purple Splendour'

J

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

J

Sow @4°C for 3 weeks, then place @20°C.
Allium 'Silver Spring'

A

Sow @ 20°C. Seed germinates within 3 months.
Allium 'Summer Beauty'

G

Sow @ 4°C for 3 months, then place @ 20°C for 3 months.
Allium 'Summer Pink'

J

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

J

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

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.
Allium aflatunense 'Purple Sensation'

*

This species needs special care as described.

6

Requires scarification. Nick or rub between sheets of sandpaper. See https://youtu.be/icB9HrqdQqU

G

Sow @ 4°C for 3 months, then place @ 20°C for 3 months.
scarify one year old seeds with sulfuric acid for 15 min, and stratify at 4°C. (from Pakistan Journal of Agricultural Sciences 2010 Vol. 47 No. 4 pp. 317-319)
Allium akaka

A

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

?

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.

L

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

Allium altaicum

A

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

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.
Allium amabile

J

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

A

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

J

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

J

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

A

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

L

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

Allium barsczewskii

L

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

Allium beesianum

J

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

A

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

F

Sow @ 4°C.
Allium carinatum ssp. pulchellum

F

Sow @ 4°C.
Allium carinatum ssp. pulchellum f. album

F

Sow @ 4°C.
Allium carolinianum

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Allium cernuum 'Graton'

A

Sow @ 20°C. Seed germinates within 3 months.
Allium cernuum 'Leo'

A

Sow @ 20°C. Seed germinates within 3 months.
Allium cernuum f. alba

A

Sow @ 20°C. Seed germinates within 3 months.
Allium cernuum ssp.obtusum

A

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

L

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