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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Clianthus formosus

A

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

2

Requires darkness.

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
Clinopodium thymifolia

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...

4

D

Use repeated cycles of 20°C, then 4°C for 3 months each. Germination is very prolonged.
Clinopodium thymifolium

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...

4

D

Use repeated cycles of 20°C, then 4°C for 3 months each. Germination is very prolonged.
Clintonia borealis

*

This species needs special care as described.

8

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

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

hydrophilic, sow as soon as seed is ripe; If not sown right away after collecting the seeds need to be kept moist at all times to remain viable. For storage put in plastic bag with barely damp vermiculite; keep them warm during summer, coolish towards the fall and then 4⁰C at the onset of winter. Do not store them in the freezer because the formation of ice crystals will damage cell membranes
Clintonia uniflora

*

This species needs special care as described.

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

hydrophilic, sow as soon as seed is ripe; If not sown right away after collecting the seeds need to be kept moist at all times to remain viable. For storage put in plastic bag with barely damp vermiculite; keep them warm during summer, coolish towards the fall and then 4⁰C at the onset of winter. Do not store them in the freezer because the formation of ice crystals will damage cell membranes
Clitoria cc

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

A

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

A

Sow @ 20°C. Seed germinates within 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
Clivia caulescens

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
hydrophilic, sow as soon as seed is ripe; If not sown right away after collecting the seeds need to be kept moist at all times to remain viable. For storage put in plastic bag with barely damp vermiculite; keep them warm during summer, coolish towards the fall and then 4⁰C at the onset of winter. Do not store them in the freezer because the formation of ice crystals will damage cell membranes
Cnicus benedictus

A

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

N

Sow directly in garden.
Cnidium dubium

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...
Cobaea scandens

A

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

!

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.

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.
Codonopsis pilosa

A

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

B

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

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...
Codonopsis cardiophylla

F

Sow @ 4°C.

*

This species needs special care as described.
poor germination
Codonopsis clematidea

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Codonopsis grey-wilsonii

A

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

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...

B

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

A

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

A

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

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...
Codonopsis tangshen

B

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

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...
Codonopsis tubulosa

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...
Codonopsis ussuriensis

3

Requires light or the small seeds should be surface sown. See https://www.youtube.com/watch?v=RgkXUSI1GWo&index=1&list=UUJfYCNSWCIuOB2...

B

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

!

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.

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

*

This species needs special care as described.
must have summer heat to germinate; may take 6 years to germinate; grow seedlings @ 4°C x 1 month
Colchicum autumnale

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

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

must have summer heat to germinate; may take 6 years to germinate; grow seedlings @ 4°C x 1 month
Colchicum bivonae

!

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.

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

must have summer heat to germinate; may take 6 years to germinate; grow seedlings @ 4°C x 1 month
Colchicum diampolis

!

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.

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

must have summer heat to germinate; may take 6 years to germinate; grow seedlings @ 4°C x 1 month
Colchicum hungaricum

!

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.

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

*

This species needs special care as described.
must have summer heat to germinate; may take 6 years to germinate; grow seedlings @ 4°C x 1 month
Colchicum kurdicum

!

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.

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

*

This species needs special care as described.
must have summer heat to germinate; may take 6 years to germinate; grow seedlings @ 4°C x 1 month
Colchicum 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.

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

*

This species needs special care as described.
must have summer heat to germinate; may take 6 years to germinate; grow seedlings @ 4°C x 1 month
Colchicum speciosum

!

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.

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

*

This species needs special care as described.
must have summer heat to germinate; may take 6 years to germinate; grow seedlings @ 4°C x 1 month
Colchicum szovitsii

!

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.

4

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

must have summer heat to germinate; may take 6 years to germinate; grow seedlings @ 4°C x 1 month
Coleostephus multicaulis

A

Sow @ 20°C. Seed germinates within 3 months.
Coleus scutellarioides 'Palisandra'

A

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

A

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

A

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

A

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

5

Germination is successful only when GA3 is used. See http://botanicallyinclined.org/fridays-seeds-with-the-ga3-seeds-treatment

Collomia grandiflora

F

Sow @ 4°C.
Colutea arborescens

A

Sow @ 20°C. Seed germinates within 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
Colutea orientalis

A

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

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
Colutea x media

A

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

2

Requires darkness.

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

Coluteocarpus vesicaria

A

Sow @ 20°C. Seed germinates within 3 months.
Coluteocarpus vesicaria ssp. vesicaria

A

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

2

Requires darkness.
Commelina coelestis

A

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

2

Requires darkness.
Commelina dianthifolia

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
tender but self seeds
Compositae 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.
Comptonia peregrina

!

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.

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.
peat based medium
Conoclinium coelestinum

J

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

A

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

A

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

1

Resents transplanting.

A

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

N

Sow directly in garden.
Consolida regalis

A

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

N

Sow directly in garden.
Consolida ajacis

A

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

N

Sow directly in garden.
Consolida ambigua

A

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

N

Sow directly in garden.

1

Resents transplanting.
Consolida sp.

A

Sow @ 20°C. Seed germinates within 3 months.
Convallaria majalis ex 'Rubra'

2

Requires darkness.

8

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

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

Convallaria majalis

A

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

2

Requires darkness.

8

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