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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Cacalia alliariae

?

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.
Cacalia auriculata

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...
Caccinia 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.
Caccinia strigosa

A

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

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

A

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

A

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

A

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

A

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

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.
Calamintha nepeta

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.
Calandrinia grandiflora

A

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

N

Sow directly in garden.
resents disturbance, perhaps fall planting
Calandrinia umbellata

A

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

2

Requires darkness.

*

This species needs special care as described.
see www.hardyorchidsociety.org.uk; exactly 20°C in darkness gives best germination;
Calceolaria 'Gold Cup'

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Calceolaria biflora 'Goldcrest'

A

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

A

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

!

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.
Calceolaria hirsuta

A

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

A

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

A

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

*

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.
see: http://www.chileflora.com/Florachilena/FloraEnglish/E_Germination_Calceolaria.htm
Calceolaria tripartita

A

Sow @ 20°C. Seed germinates within 3 months.
Calendula officinalis 'Neon'

A

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

A

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

A

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

2

Requires darkness.
Calla 'New Armour'

A

Sow @ 20°C. Seed germinates within 3 months.
Calla 'Pink Gem'

A

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

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.

*

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

A

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

!

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.

G

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

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

Callianthemum kernerianum

!

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.

F

Sow @ 4°C.
Callicarpa bodinieri

A

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

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

Callicarpa dichotoma 'Issai'

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

Callicarpa japonica 'Leucocarpa'

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
crush dried berries to release seed
Callicarpa sp.

8

Pulpy coat inhibits germination. Remove by soaking and rinsing in clean water daily for approximately 7 days. Discard water.
Callirhoe digitata

A

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

1

Resents transplanting.
Callirhoe involucrata

A

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

A

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

6

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

A

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

A

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

A

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

*

This species needs special care as described.
germination enhanced by smoke
Callistephus chinensis 'Hulk'

A

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

*

This species needs special care as described.
germination enhanced by smoke
Callistephus chinensis 'Pavlova Dark Blue'

A

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

*

This species needs special care as described.
germination enhanced by smoke
Calluna vulgaris

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...
Calluna vulgaris 'Dainty Bess'

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...
Calluna vulgaris 'White Lawn'

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...
Calochortus amoenus

*

This species needs special care as described.
challenging, try 20°C x 12 weeks, then 4°C x 4 weeks then 20°C again, or put in damp peat with fungicide in fridge and pot up when radicle appears, grow cool for 5 months
Calochortus barbatus

G

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

*

This species needs special care as described.
will rot if medium is too moist; grow undisturbed x 2 years
Calochortus macrocarpus

G

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

*

This species needs special care as described.
will rot if medium is too moist; grow undisturbed x 2 years
Calochortus nuttallii

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.
leave in pot for 2 years, keep barely moist douring dormancy
Calochortus sp.

*

This species needs special care as described.
See http://www.pacificbulbsociety.org/pbswiki/index.php/Calochortus
Calochortus tolmiei

J

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

*

This species needs special care as described.
Collect the capsules in early Sept. before they split. Either sow in a dryish sphagnum bog or surface sterilize the capsule,remove the seed aseptically and sow thinly in a good culture medium. Some will germinate at 20°C, remainder germinate if put at 4°C for 2 months. Need bright light to grow. "Alternatively, you can collect mature seed and sow in a sphagnum bog.
Caltha leptosepala ssp. howellii

!

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.

A

Sow @ 20°C. Seed germinates within 3 months.
bog plant; stand pot in 3 cm water; raise temperature very slowly after germination
Caltha biflora

!

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.

*

This species needs special care as described.
bog plant; stand pot in 3 cm water; raise temperature very slowly after germination
Caltha leptosepala

!

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.

*

This species needs special care as described.
bog plant; stand pot in 3 cm water; raise temperature very slowly after germination