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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Allium senescens x nutans

A

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

F

Sow @ 4°C.
Allium sikkimense

A

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

F

Sow @ 4°C.
Allium sp.

*

This species needs special care as described.

J

Sow @4°C for 3 weeks, then place @20°C.
seed viability < 1 year for all cold germinators except for A. cristophii
Allium sphaerocephalum

G

Sow @ 4°C for 3 months, then place @ 20°C for 3 months.
Allium sphaerocephalum 'Hair'

G

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

A

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

A

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

A

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

*

This species needs special care as described.

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.
scarify one year old seeds with sulfuric acid for 15 min, and stratify at 4°C.
Allium stipitatum 'Mount Everest'

J

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

J

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

*

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...

F

Sow @ 4°C.
requires long cold period - more than 45 days
Allium sylvestris

J

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

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

Allium tanguticum

A

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

J

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

J

Sow @4°C for 3 weeks, then place @20°C.
Allium thunbergii ‘Ozawa’

J

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

J

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

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.
see http://botanicallyinclined.org/lost-in-translation-updates-on-germination-requirements/
Allium tschimganicum

?

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.
Allium tuberosum

A

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

J

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

J

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

!

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.

J

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

!

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.
Allium victorialis ssp. platyphyllum

!

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.
Allium victorialis var. platyphyllum

!

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.
Allium vineale

G

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

J

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

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

Alnus japonica

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...
Alonsoa linearis

A

Sow @ 20°C. Seed germinates within 3 months.
Alstroemeria 'Dr Salter's Hybrids'

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
maintain constant humidity
Alstroemeria aurantiaca

A

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

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
try excizing a bit of seed coat after warm cycle
Alstroemeria aurea

C

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

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.
try excizing a bit of seed coat after warm cycle; grow seedlings at cool temperature
Alstroemeria aurea 'Lutea'

C

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

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.
try excizing a bit of seed coat after warm cycle; grow seedlings at cool temperature
Alstroemeria hybrid

C

Sow @ 20°C for 3 months, then place @ 4°C for 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.
try excizing a bit of seed coat after warm cycle
Alstroemeria ligtu hybrid

*

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

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
try excizing a bit of seed coat after warm cycle
Alstroemeria lutea

A

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

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
Alstroemeria presliana ssp. australis

?

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.
not hardy, likely a warm germinator
Alstroemeria psittacina

*

This species needs special care as described.

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

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
20% germination; brittle roots transplant poorly
Alstroemeria sp.

*

This species needs special care as described.

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

C

Sow @ 20°C for 3 months, then place @ 4°C for 3 months.
try excizing a bit of seed coat after warm cycle
Alternanthera ficoidea

A

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

A

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

A

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

A

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

2

Requires darkness.

A

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

N

Sow directly in garden.
Althaea taurinensis

A

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

B

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

A

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

B

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

A

Sow @ 20°C. Seed germinates within 3 months.
Alyssum 'Gold Crest'

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Alyssum bertolonii ssp. bertolonii

A

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

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...