Germination Guide

Click on a species name below to see it's germination tips.
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Succisa pratensis

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...
Succisa pratensis 'Nana'

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.
Succisella inflexa

A

Sow @ 20°C. Seed germinates within 3 months.
Succisella inflexa 'Frosted Pearls'

A

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

*

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  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.

N

Sow directly in garden.
plant does not tolerate phosphate in fertilizer or soil
Swertia schugnanica

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

Symphoricarpos 'Amethyst'

8

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

D

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

A

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

A

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

A

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

A

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

A

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

A

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

J

Sow @4°C for 3 weeks, then place @20°C.
Symphyotrichum oolentangiense

A

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

B

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

B

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

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
Symphytum x uplandicum 'Axminster Gold'

A

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

?

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.

!

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

Syneilesis aconitifolia

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
sets very little viable seed (good seed is fat and substantial and does not yield to pressure); see photo illustrating much "fluff" and very little seed
Syneilesis intermedia

A

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

*

This species needs special care as described.
sets very little viable seed (good seed is fat, substantial and does not yield to pressure)
Syneilesis palmata

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

warm forest composite
Synthyris missurica

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

Synurus deltoides

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

Syringa wolfii

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

Syringa pekinensis

G

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

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...
Syringa reticulata v. amurensis

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.
Syringa reticulata v. mandshurica

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...
Syringa yunnanensis

J

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