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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Alcea rosea

A

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

2

Requires darkness.

*

This species needs special care as described.
biennial, sow fresh in autumn or in situ in spring
Alcea rosea 'Fiesta Time'

*

This species needs special care as described.

2

Requires darkness.

B

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

N

Sow directly in garden.
biennial, sow fresh in autumn or in situ in spring
Alcea rosea 'Mars Magic'

A

Sow @ 20°C. Seed germinates within 3 months.
Alcea rosea 'Nigra'

B

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

N

Sow directly in garden.

2

Requires darkness.

*

This species needs special care as described.
biennial, sow fresh in autumn or in situ in spring
Alcea rosea 'Queeny Purple'

2

Requires darkness.

B

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

N

Sow directly in garden.
Alcea rosea 'The Watchman'

*

This species needs special care as described.

2

Requires darkness.

B

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

N

Sow directly in garden.
biennial, sow fresh in autumn or in situ in spring
Alcea rosea Chater's Double Group

*

This species needs special care as described.

2

Requires darkness.

B

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

N

Sow directly in garden.
biennial, sow fresh in autumn or in situ in spring
Alcea rosea East Coast Hybrid

A

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

2

Requires darkness.

*

This species needs special care as described.
biennial, sow fresh in autumn or in situ in spring
Alcea rugosa

A

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

2

Requires darkness.

*

This species needs special care as described.
biennial, sow fresh in autumn or in situ in spring
Alcea sp.

B

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

N

Sow directly in garden.

2

Requires darkness.

*

This species needs special care as described.
biennial, sow fresh in autumn or in situ in spring
Alchemilla glaucescens ssp. pubescens

A

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

A

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

A

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

*

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 alpigena

*

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 alpina

*

This species needs special care as described.
20°C (dark), then 4°C, then outdoor temperatures
Alchemilla erythropoda

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
germination enhanced by smoke
Alchemilla faeroensis v. pumila

J

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

*

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 mollis

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...
Alchemilla monticola

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 plicatula

A

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

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

Aliciella subnuda

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

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

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

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

A

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

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

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

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

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

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

Allium cernuum v. obtusum

A

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

?

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

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

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

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

Allium karataviense ssp. henrikii

!

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.
store seed @ 4°C; seed stored @ 20°C takes 6-9 months to germinate
Allium karataviense ssp. henrikii

!

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.
store seed @ 4°C; seed stored @ 20°C takes 6-9 months to germinate
Allium paczoskianum

A

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

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

Allium schoenoprasum f. albiflorum

A

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

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

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.