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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Alyssum stribrnyi

A

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

A

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

A

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

N

Sow directly in garden.
Amaranthus cruentus

A

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

*

This species needs special care as described.
protect from damping off
Amaranthus hybrid

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
protect from damping off
Amaranthus hybridus

A

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

*

This species needs special care as described.
protect from damping off
Amaranthus hypochondriacus

A

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

*

This species needs special care as described.
protect from damping off; grow cool
Amaranthus sp.

A

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

*

This species needs special care as described.
protect from damping off
Amaryllis 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.

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
hydrophilic, sow as soon as seed is ripe; ; will not germinate if seed has dried; if stored, must be put in plastic bag with barely damp vermiculite;Keep them warm during summer, coolish towards the fall and then 4⁰C at the onset of winter. Do not store them in the freezer because the formation of ice crystals will damage cell membranes;
Amberboa muricata

A

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

N

Sow directly in garden.
Amelanchier canadensis

*

This species needs special care as described.
20°x 4 weeks, then expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring.
Ammi majus

A

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

2

Requires darkness.
Ammi visnaga

A

Sow @ 20°C. Seed germinates within 3 months.
Ammi visnaga 'Green Mist'

A

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

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.
Amorpha nana

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

G

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

!

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.

A

Sow @ 20°C. Seed germinates within 3 months.
Sow 5 mm deep in a pocket of sand in a 9 cm pots which contains well drained soil. Germinate in bright light @ 26 °C. Keep moist, but not too wet. During the dormant period, small plants may still need a little watering.
Ampelodesmos mauritanicus

A

Sow @ 20°C. Seed germinates within 3 months.
Ampelopsis brevipedunculata 'Variegata'

8

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

G

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

G

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

8

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

8

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

G

Sow @ 4°C for 3 months, then place @ 20°C for 3 months.
Ampelopsis glandulosa v. brevipedunculata

G

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

8

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

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.
Amsonia ciliata 'Halfway to Arkansas'

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

Amsonia ellipsoides

G

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

G

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

C

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

C

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

G

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

F

Sow @ 4°C.
Amsonia jonesii

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...
Amsonia ludoviciana

F

Sow @ 4°C.
Amsonia orientalis

G

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

F

Sow @ 4°C.
Amsonia tabernaemontana

G

Sow @ 4°C for 3 months, then place @ 20°C for 3 months.
Amsonia tabernaemontana 'Montana'

G

Sow @ 4°C for 3 months, then place @ 20°C for 3 months.
Amsonia tabernaemontana v. salicifolia

G

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

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Anacyclus pyrethrum v. depressus

A

Sow @ 20°C. Seed germinates within 3 months.
Anacyclus pyrethrum v. depressus 'Gnome'

A

Sow @ 20°C. Seed germinates within 3 months.
Anagallis monelli ex 'Skylover'

A

Sow @ 20°C. Seed germinates within 3 months.
Anagallis 'Skylover'

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Anagallis monelli ssp. linifolia

A

Sow @ 20°C. Seed germinates within 3 months.
Anagallis sp.
grow in plastic bag for humidity
Anaphalis lactea

A

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

A

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

A

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

A

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

A

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

A

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

A

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

2

Requires darkness.
Anchusa azurea

A

Sow @ 20°C. Seed germinates within 3 months.
Anchusa azurea 'Feltham Pride'

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Anchusa leptophylla ssp. incana

A

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

A

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

2

Requires darkness.