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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Agastache urticifolia

A

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

A

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

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.
Ageratina occidentalis

A

Sow @ 20°C. Seed germinates within 3 months.
Ageratum houstonianum 'Leilani Blue'

A

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

A

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

A

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

B

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

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.

N

Sow directly in garden.
Agrostemma githago 'Ocean Pearl'

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.

N

Sow directly in garden.
Agrostemma sp.

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.
Agrostis nebulosa

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
grow on @ 14 ° C
Aguilegia vulgaris 'Winky Blue'

A

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

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.
Ajuga pyramidalis

A

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

G

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

A

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

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
Albizia julibrissin v. rosea

A

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

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
Albuca humilis

A

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

2

Requires darkness.
Albuca nelsonii

!

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.
Albuca shawii

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.
Albuca 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.

*

This species needs special care as described.

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.
all species germinate very well when fresh
Albuca tenuifolia

A

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

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 'Black Knight'

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 apterocarpa

A

Sow @ 20°C. Seed germinates within 3 months.
Alcea East Coast Hybrid

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 ficifolia

*

This species needs special care as described.

2

Requires darkness.

A

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

N

Sow directly in garden.
biennial, sow fresh in autumn or in situ in spring
Alcea froloviana

A

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

6

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

A

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

6

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

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.

N

Sow directly in garden.
Alcea pallida

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.

*

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