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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Chionanthus retusus

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

C

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

C

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

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
Chionodoxa 'Lilacina'

*

This species needs special care as described.

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

best sown in fall; grow seedlings @ 4°C; leave in pot for 2 years before planting out
Chionodoxa forbesii

*

This species needs special care as described.

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

best sown in fall; grow seedlings @ 4°C; leave in pot for 2 years before planting out
Chionodoxa luciliae

*

This species needs special care as described.

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

best sown in fall; grow seedlings @ 4°C; leave in pot for 2 years before planting out
Chondrosum gracile

A

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

A

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

*

This species needs special care as described.
very thick seed coat; hard to germinate; may benefit from leaching effect of rain
Chrysanthemum weyrichii

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Chrysanthemum 'Sunny Side Up'

A

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

B

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

A

Sow @ 20°C. Seed germinates within 3 months.
Chrysanthemum coccineum 'Robinson Mix'

A

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

A

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

N

Sow directly in garden.
Chrysanthemum leontopodium

A

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

!

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.
Chrysanthemum minimum

A

Sow @ 20°C. Seed germinates within 3 months.
Chrysanthemum multicaule 'Moonlight'

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Chrysanthemum x superbum

A

Sow @ 20°C. Seed germinates within 3 months.
Chrysogonum virginianum ‘Norman Singer’
Chrysopsis falcata

J

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

G

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

A

Sow @ 20°C. Seed germinates within 3 months.
Chrysosplenium macrostemon v. shiobarense

!

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.

H

Use repeated cycles of 4°C, then 20°C for 3 months each. Germination is very prolonged.
moist-packed seed, 5(3m)20(3 m)5(6m)20(3m)5(6m) germinated in cold.
Chrysothamnus nauseosus

A

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

A

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

*

This species needs special care as described.

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
ensure seeds get full 3 months @ 4°C
Cimicifuga americana

*

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.
ensure seeds get full 3 months @ 4°C
Cimicifuga dahurica

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.
Cimicifuga europaea

!

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.

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
ensure seeds get full 3 months @ 4°C
Cimicifuga foetida

!

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.

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
ensure seeds get full 3 months @ 4°C
Cimicifuga japonica

*

This species needs special care as described.

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
ensure seeds get full 3 months @ 4°C
Cimicifuga racemosa

*

This species needs special care as described.

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
ensure seeds get full 3 months @ 4°C
Cimicifuga ramosa

*

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.
ensure seeds get full 3 months @ 4°C
Cimicifuga rubrifolia

C

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

*

This species needs special care as described.

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
ensure seeds get full 3 months @ 4°C
Cimicifuga simplex 'Brunette'

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
Cimicifuga simplex 'Hillside Black Beauty'

*

This species needs special care as described.

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
ensure seeds get full 3 months @ 4°C
Cimicifuga simplex (Atropurpurea Group)

*

This species needs special care as described.

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
ensure seeds get full 3 months @ 4°C
Cimicifuga 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.

J

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

*

This species needs special care as described.
difficult to germinate,ensure seeds get full 3 months @ 4°C
Cirsium canum

A

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

B

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

B

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

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.
Cirsium diacantha

A

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

B

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

J

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

A

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

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

Cirsium esculentum

A

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

A

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

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.
Cirsium muticum

A

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

*

This species needs special care as described.
bog plant; stand pot in 3 cm water
Cirsium proteanum

?

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.

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
requires fire to germinate; press seed into medium, cover with 10 cm of pine needles, burn completely, moisten medium, germination takes several months, germination rate is low
Cirsium rivulare

A

Sow @ 20°C. Seed germinates within 3 months.
Cirsium rivulare 'Atropurpureum'

A

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

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.
Cirsium spinosissimum ssp. bertolonii

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.
Cistanthe grandiflora

A

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