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.

Cyclamen hederifolium 'Ruby Glow'

A

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

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclamen intaminatum

A

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

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclamen libanoticum

A

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

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclamen mirabile

A

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

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclamen mix

*

This species needs special care as described.

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclamen neapolitanum

A

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

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclamen persicum cultivar

A

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

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclamen purpurascens

A

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

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclamen purpurascens ssp. purpurascens

A

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

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclamen repandum

A

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

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclamen repandum ssp. rhodense

A

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

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclamen sp.

A

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

2

Requires darkness.

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.
add detergent to water when soaking, sow in equal parts of peat, loam and grit with extra richness at bottom of pot, space 2" apart, allow absolutely no light during germination, provide steady supply of moisture, grow on in pot for 18 months, keeping leaves on as long as possible, stratification may be fatal
Cyclanthera pedata

*

This species needs special care as described.
Jim Graham, an ORG&HPS member writes: For Cyclanthera pedata, there is an agonizing excerpt from the Kew guide ("..germinate on agar..two years.." etc). I obtained the seeds before I read the description, and when I did I promptly undertook the following alternate germination strategy: 1. Throw packet of seeds into sock drawer and leave there (in darkness) for about a month. Periodic opening of drawer and cursing at seeds may have been of benefit. 2. Remove seeds from packet and nick the coat with a nail file. 3. Put the seeds into a small container and soak at room temp....but then forget about them so they stay in the water for about 4 days. 4. Plant at room temp under lights. Cover with a thin layer of potting medium (I use Pro-Mix). When I did this 5 seeds popped after about a week. As there were only about 5 or 6 seeds in the pack it was a pretty good success rate. Kew's "Difficult Seeds Project": Germinate on agar, germination paper or sand at 30ºC. Incubating the seeds in 24hr darkness may also help germination. The seeds of this species may be Physiologically Dormant (based on other members of the same family). If germination is low, this type of seed dormancy can be overcome by mimicking the seasonal patterns of the species' native habitat. Use a moist pre-chill or pre-heat treatment (depending on local climatic conditions) or a dry after-ripening treatment, before germinating the seeds on agar, germination paper or sand at their optimum temperature. If this does not work, you can perform delicate surgery to enable the embryo to grow. Excise the tissue near the root tip. Glen Spurrell adds: It is a warm germinator and should be planted in situ when the soil is very warm in late spring early summer. It might also be noted it germinates quickly and growers should not plant too many because the vines are quite rampant. It’s a vegetable and it’s not hardy. Both the seed pods and the young tips of the vines are edible, although to be honest the pods are almost without flavour. The tips are lovely raw in a salad.
Cydonia oblonga

*

This species needs special care as described.
20°C x 2 weeks then 4°C x 16 weeks
Cydonia oblongata

!

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

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

Cymbalaria aequitriloba

A

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

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...
Cynara cardunculus

A

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

A

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

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...

*

This species needs special care as described.
if no gemination in 30 days, move to light
Cynoglossum creticum

A

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

A

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

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

6

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

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

Cypella caerulea

A

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

A

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

!

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.

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.
Cypella sp.

A

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

A

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

*

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

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...
Cyperus sp.

J

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

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...

*

This species needs special care as described.
very difficult; grow in moist compost to which has been added soil from parent plant to provide symbiotic fungi or sow outside in spring in acid duff
Cypripedium calceolus

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...

*

This species needs special care as described.
very difficult; grow in moist compost to which has been added soil from parent plant to provide symbiotic fungi or sow outside in spring in acid duff
Cypripedium calceolus v. parviflorum

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...

*

This species needs special care as described.
very difficult; grow in moist compost to which has been added soil from parent plant to provide symbiotic fungi or sow outside in spring in acid duff
Cypripedium calceolus v. pubescens

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...

*

This species needs special care as described.
very difficult; grow in moist compost to which has been added soil from parent plant to provide symbiotic fungi or sow outside in spring in acid duff
Cypripedium candidum

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...

*

This species needs special care as described.
very difficult; grow in moist compost to which has been added soil from parent plant to provide symbiotic fungi or sow outside in spring in acid duff
Cypripedium macranthos

*

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.
very difficult; grow in moist compost to which has been added soil from parent plant to provide symbiotic fungi or sow outside in spring in acid duff
Cypripedium pubescens

*

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.
very difficult; grow in moist compost to which has been added soil from parent plant to provide symbiotic fungi or sow outside in spring in acid duff
Cypripedium reginae

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...

*

This species needs special care as described.
very difficult; grow in moist compost to which has been added soil from parent plant to provide symbiotic fungi or sow outside in spring in acid duff
Cyrtanthus elatus

!

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.
float the seeds until they sprout, then carefully plant just underneath the medium surface
Cystopteris fragilis

A

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

*

This species needs special care as described.
pour boiling water over milled sphagnum moss, sow seeds, enclose in plastic bag
Cytisus 'Vancouver Gold'

*

This species needs special care as described.

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

J

Sow @4°C for 3 weeks, then place @20°C.
soak in hot water
Cytisus austriacus ssp. pygmaeus

*

This species needs special care as described.

1

Resents transplanting.

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.
soak in HOT water
Cytisus decumbens

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

*

This species needs special care as described.
soak in hot water
Cytisus praecox

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

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

*

This species needs special care as described.
soak in hot water
Cytisus procumbens

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

*

This species needs special care as described.
soak in very hot water
Cytisus purpureus

1

Resents transplanting.

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.
soak in HOT water
Cytisus pygmaeus

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
Cytisus sp.

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

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

*

This species needs special care as described.
soak in hot water