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.
Click Reset anytime to start a new search.

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.
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.
Cistus albanicus

!

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.
Cistus incanus

A

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

!

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.
Cistus sp.

6

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

*

This species needs special care as described.
use firm pressure when scarifying; is usually scarified by fire
Cladanthus arabicus

A

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

N

Sow directly in garden.
Cladrastis kentukea

*

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 in hot tap water, leave to soak for 24 hours
Cladrastis lutea

*

This species needs special care as described.

6

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

F

Sow @ 4°C.
scarify in hot tap water, leave to soak for 24 hours
Clarkia amoena

A

Sow @ 20°C. Seed germinates within 3 months.
Clarkia rubicunda ssp. blasdalei

A

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

N

Sow directly in garden.
Claytonia caroliniana

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.

*

This species needs special care as described.
peat based medium
Claytonia lanceolata

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.

*

This species needs special care as described.
peat based medium
Claytonia megarhiza

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

Claytonia 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.

C

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

*

This species needs special care as described.
germination unlikely after dry storage > 6 months; peat based medium
Clematis 'Alba Chirifu'

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.

A

Sow @ 20°C. Seed germinates within 3 months.
Clematis 'Burford Bell'

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.

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
Clematis 'Burford Bell' x crispa (blue)

H

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

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.

G

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

?

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.

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.

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.
texensis/viorna cross; sow in acidic soil; seedling will die back quickly, but keep pot as it will recover