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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Soldanella montana

!

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.
Soldanella rhodopaea

!

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...

G

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

G

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

J

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

A

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

*

This species needs special care as described.
remove seed from shell
Solenanthus sp.

J

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

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

Solenostemon scutellarioides

A

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

A

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

J

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

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.
Solidago simplex var. ontarioensis

A

Sow @ 20°C. Seed germinates within 3 months.
Solidago virgaurea subsp. jailarum

A

Sow @ 20°C. Seed germinates within 3 months.
Solidago 'Queenie'

J

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

A

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

A

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

A

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

A

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

A

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

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

Solidago glomerata

A

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

A

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

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.
Solidago jailarum

A

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

A

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

A

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

A

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

A

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

J

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

3

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Solidago simplex var. ontarioensis

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Solidago sphacelata 'Golden Fleece'

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.
Solidago spiraeifolia

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

Solidago virgaurea

A

Sow @ 20°C. Seed germinates within 3 months.
Solidago virgaurea ssp. virgaurea

A

Sow @ 20°C. Seed germinates within 3 months.
Solidago virgaurea subsp. jailarum

A

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

!

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.

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.
Sorbaria angustifolia

A

Sow @ 20°C. Seed germinates within 3 months.
Sorbaria tomentosa v. angustifolia

A

Sow @ 20°C. Seed germinates within 3 months.
Sorbus aria 'Lutescens'

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.
Sorbus latifolia

!

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.
20°C x 2 weeks then 4°C x 16 weeks
Sorbus torminalis

*

This species needs special care as described.
20° x 2 weeks, then 4° until germinated - up to 30 weeks
Sorbus yuana

?

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.

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

Sorbus americana

G

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

2

Requires darkness.
Sorbus aucuparia 'Rossica'

*

This species needs special care as described.
20°C x 10 weeks then outdoors at end of March
Sorbus decora

!

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.
20°C x 2 weeks then 4°C x 16 weeks
Sorbus intermedia

!

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.
20°C x 2 weeks then 4°C x 16 weeks
Sorbus koehneana

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

Sorbus pohuashanensis

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.
Sorbus pseudovilmorinii

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

Sorbus reducta

J

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

!

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.
20°C x 2 weeks then 4°C x 16 weeks
Sorbus 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

Sorbus 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

Sorghastrum avenaceum

G

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

G

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