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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Hypericum athoum

A

Sow @ 20°C. Seed germinates within 3 months.
Hypericum aviculariifolium ssp. uniflorum

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.
Hypericum bupleuroides

?

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...

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

Hypericum canadense

3

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

G

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

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.
Hypericum inodorum

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.
Hypericum kalmianum

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

Hypericum kamtschaticum

A

Sow @ 20°C. Seed germinates within 3 months.
Hypericum kiusianum v. yakusimense

A

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

!

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.

4

A

Sow @ 20°C. Seed germinates within 3 months.
Hypericum olympicum f. grandiflorum

!

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.

4

A

Sow @ 20°C. Seed germinates within 3 months.
Hypericum olympicum f. uniflorum 'Citrinum'

!

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.

4

A

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

A

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

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.
Hypericum prolificum

A

Sow @ 20°C. Seed germinates within 3 months.
Hypericum pseudopetiolatum v. yakusimense

A

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

A

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

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

Hypericum tomentosum

A

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

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.
Hypericum virginicum

A

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

A

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

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.
Hypochaeris uniflora

B

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

A

Sow @ 20°C. Seed germinates within 3 months.
many empty seedcoats
Hyssopus officinalis

2

Requires darkness.

A

Sow @ 20°C. Seed germinates within 3 months.
Hyssopus officinalis 'Roseus'

A

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

2

Requires darkness.
Hyssopus officinalis ssp. aristatus

A

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

2

Requires darkness.
Hysteria patula

*

This species needs special care as described.
see http://www.phytotechlab.com
Hystrix patula

A

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