Germination Guide

Click on a species name below to see it's germination tips.
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Abeliophyllum distichum

!

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

Expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring.
Abelmoschus manihot

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.
Abies concolor

J

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

J

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

2

Requires darkness.
Abies koreana 'Silberlocke'

2

Requires darkness.

J

Sow @4°C for 3 weeks, then place @20°C.
Abies koreana 'Starker's Dwarf'

J

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
germination is erratic
Abutilon x hybridum

A

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

6

Requires scarification. Nick or rub between sheets of sandpaper.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.

A

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

6

Requires scarification. Nick or rub between sheets of sandpaper.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.

A

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

A

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

6

Requires scarification. Nick or rub between sheets of sandpaper.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.

*

This species needs special care as described.
immerse in boiling water for 1 minute, then soak x 2 days in cool water
Acaena adscendens

A

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

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.
Acaena caesiglauca

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.
Acaena glaucophylla

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.
Acaena hieronymi

A

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

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.
Acaena microphylla

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.
Acaena microphylla 'Kupferteppich'

L

Expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring.
Acaena novae-zelandiae

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.
Acaena pinnatifida

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.
Acaena saccaticupula

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.

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.
Acaena saccaticupula 'Blue Haze'

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.

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.
Acantholimon araxanum

A

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

*

This species needs special care as described.
genus rarely sets seed, short viability, ungerminated seed should be discarded after 4 weeks
Acantholimon armenum

A

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

*

This species needs special care as described.
genus rarely sets seed, short viability, ungerminated seed should be discarded after 4 weeks
Acantholimon avenaceum

A

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

A

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

*

This species needs special care as described.
genus rarely sets seed, short viability, ungerminated seed should be discarded after 4 weeks
Acantholimon bracteatum capitatum

A

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

*

This species needs special care as described.
genus rarely sets seed, short viability, ungerminated seed should be discarded after 4 weeks
Acantholimon caryophyllaceum

A

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

*

This species needs special care as described.
genus rarely sets seed, short viability, ungerminated seed should be discarded after 4 weeks
Acantholimon glumaceum

A

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

*

This species needs special care as described.
genus rarely sets seed, short viability, ungerminated seed should be discarded after 4 weeks
Acantholimon hohenackeri

B

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

*

This species needs special care as described.
genus rarely sets seed, short viability, ungerminated seed should be discarded after 4 weeks
Acantholimon karelinii

A

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

*

This species needs special care as described.
genus rarely sets seed, short viability, ungerminated seed should be discarded after 4 weeks
Acantholimon litvinovii

L

Expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring.
Acantholimon reflexifolium

A

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

*

This species needs special care as described.
genus rarely sets seed, short viability, ungerminated seed should be discarded after 4 weeks
Acantholimon sp.

B

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

*

This species needs special care as described.
genus rarely sets seed, short viability, ungerminated seed should be discarded after 4 weeks
Acantholimon ulicinum

B

Sow @ 20°C. If seed does not germinate within 3 months, try 4°C for 1-2 months, then 20°C again.
genus rarely sets seed, short viability, ungerminated seed should be discarded after 4 weeks
Acanthopanax sessiliflorus

*

This species needs special care as described.
20°C x 6 months then 4°C x 3 months
Acanthopanax sessiliflorus v. parviceps

*

This species needs special care as described.
20°C x 6 months then 4°C x 3 months
Acanthus hungaricus

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.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.
Acanthus mollis

F

Sow @ 4°C.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.
Acanthus mollis Latifolius group

F

Sow @ 4°C.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.
Acanthus spinosus

F

Sow @ 4°C.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.
Acer palmatum 'Red Pygmy'
Acer amurensis

H

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

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.
Acer argutum

L

Expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.
Acer barbinerve

G

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

H

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

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.
Acer caudatum ssp. ukurunduense

!

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.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.
Acer davidii

L

Expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring.
Acer ginnala

G

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

H

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

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.
Acer glabrum ssp. douglasii

H

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

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.
Acer griseum

G

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

6

Requires scarification. Nick or rub between sheets of sandpaper.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.

*

This species needs special care as described.
5% germination, soak 3 weeks in water to remove outer seed coat or pry it off, then slice off small portion of inner seed coat with razor
Acer japonicum

*

This species needs special care as described.

G

Sow @ 4°C for 3 months, then place @ 20°C for 3 months.
remove inner seed coat after 4°C cycle
Acer japonicum aconitifolia

L

Expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring.
Acer japonicum dissectum

G

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

*

This species needs special care as described.
remove inner seed coat after 4°C cycle, may take 3 years to germinate
Acer mandshuricum

G

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

3

Requires light or the small seeds should be surface sown.

6

Requires scarification. Nick or rub between sheets of sandpaper.

7

Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and the water used for soaking.

*

This species needs special care as described.
soak 3 weeks in water to remove outer seed coat or pry it off, then slice off small portion of inner seed coat with razor
Acer palmatum

G

Sow @ 4°C for 3 months, then place @ 20°C for 3 months.
Acer palmatum 'Dissectum Atropurpureum'

G

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