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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Haberlea rhodopensis

A

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

*

This species needs special care as described.
tiny shallow roots - seedling must be ensured constant moisture by enclosing pot in plastic bag
Haberlea sp.

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Hackelia 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.
Hacquetia epipactis

!

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

Haemanthus albiflos

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Hakonechloa macra 'Aureola'

A

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

?

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.

3

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

J

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

*

This species needs special care as described.

D

Use repeated cycles of 20°C, then 4°C for 3 months each. Germination is very prolonged.
pretreat with sulphuric acid CAUTION: THIS CAN BE A DANGEROUS PROCEDURE, overwinter seed outdoors after 3 months @ 20°C
Halesia tetraptera var. monticola

D

Use repeated cycles of 20°C, then 4°C for 3 months each. Germination is very prolonged.
pretreat with sulphuric acid CAUTION: THIS CAN BE A DANGEROUS PROCEDURE, overwinter seed outdoors after 3 months @ 20°C
Halesia carolina

C

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

*

This species needs special care as described.
pretreat with sulphuric acid CAUTION: THIS CAN BE A DANGEROUS PROCEDURE
Halesia monticola

D

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

*

This species needs special care as described.
pretreat with sulphuric acid CAUTION: THIS CAN BE A DANGEROUS PROCEDURE, overwinter seed outdoors after 3 months @ 20°C
Halesia tetraptera

C

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

*

This species needs special care as described.
pretreat with sulphuric acid CAUTION: THIS CAN BE A DANGEROUS PROCEDURE
Haloragis erecta 'Wellington Bronze'

H

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

2

Requires darkness.

6

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

D

Use repeated cycles of 20°C, then 4°C for 3 months each. Germination is very prolonged.
Hamamelis x intermedia 'Arnold Promise'

D

Use repeated cycles of 20°C, then 4°C for 3 months each. Germination is very prolonged.
Hamamelis x intermedia 'Jelena'

D

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

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
Hastingsia alba

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

Hebe 'Carl Teschner'

!

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

Hebe 'Youngii'

!

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

Hebe perfoliata

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

Hebe 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

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

Hebe species

!

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

Hedychium spicatum

A

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

A

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

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.
Hedysarum alpinum

B

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

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

*

This species needs special care as described.
plant in deep pot
Hedysarum boreale ssp. mackenzii

B

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

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

*

This species needs special care as described.
protect from damping off; plant in deep pot, does not transplant well
Hedysarum grandiflorum

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.
Helenium bigelovii ex 'Big Top'

B

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

B

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

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Helenium 'Sahin's Early Flowerer'

B

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

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.
Helenium autumnale

B

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

A

Sow @ 20°C. Seed germinates within 3 months.
Helenium bigelovii 'Tip Top'

A

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

A

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

A

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

B

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

B

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

A

Sow @ 20°C. Seed germinates within 3 months.
Helianthemum apenninum v. roseum

F

Sow @ 4°C.
Helianthemum canum ssp. balcanicum

A

Sow @ 20°C. Seed germinates within 3 months.
Helianthemum 'Ben Nevis'

D

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

A

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

D

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

F

Sow @ 4°C.
Helianthemum canum

A

Sow @ 20°C. Seed germinates within 3 months.
Helianthemum canum subsp balcanicum

A

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

D

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

A

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

A

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

D

Use repeated cycles of 20°C, then 4°C for 3 months each. Germination is very prolonged.
Helianthemum nummularium ssp. grandiflorum

D

Use repeated cycles of 20°C, then 4°C for 3 months each. Germination is very prolonged.
Helianthemum nummularium ssp. nummularium

D

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