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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Heuchera pulchella

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...
Heuchera richardsonii

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...
Heuchera sanguinea

A

Sow @ 20°C. Seed germinates within 3 months.
Heuchera 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.
best grown in plastic bag for humidty
Heuchera versicolor

A

Sow @ 20°C. Seed germinates within 3 months.
Heuchera villosa 'Palace Purple'

A

Sow @ 20°C. Seed germinates within 3 months.
Heuchera villosa var. macrorhiza

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.
Heuchera x brizoides

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...
Hibiscus mix

!

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.
Hibiscus mutabilis

A

Sow @ 20°C. Seed germinates within 3 months.
Hibiscus 'White River'

A

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

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

Hibiscus cannabinus

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

A

Sow @ 20°C. Seed germinates within 3 months.
see http://www.kew.org/science-research-data/kew-in-depth/difficult-seeds/species-profiles/hibiscus-cannabinus/index.htm
Hibiscus cannabinus 'Amethyst'

!

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.

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
Hibiscus ludwigii

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.
Hibiscus militaris

A

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

N

Sow directly in garden.
Hibiscus moscheutos

!

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.

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
Hibiscus moscheutos 'Blue River II'

!

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.

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
Hibiscus moscheutos (Southern Belle Group)

!

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.
Hibiscus moscheutos ssp. palustris

!

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.

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
Hibiscus moscheutos ‘Luna Rose’

!

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.
Hibiscus palustris

!

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.
Hibiscus sinensis

A

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

A

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

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
Hibiscus syriacus

A

Sow @ 20°C. Seed germinates within 3 months.
Hibiscus syriacus 'Blue Bird'

A

Sow @ 20°C. Seed germinates within 3 months.
Hibiscus syriacus 'Blue Satin'

A

Sow @ 20°C. Seed germinates within 3 months.
Hibiscus syriacus 'Diana'

A

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

2

Requires darkness.

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.
Hibiscus trionum 'Simply Love'

A

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

2

Requires darkness.

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
Hibiscus trionum 'Vanilla Ice'

A

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

2

Requires darkness.

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

*

This species needs special care as described.
add a tiny bit of detergent while soaking
Hieracium pachylodes subsp. floccivelatum

A

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

A

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

A

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

A

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

A

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

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...
Hieracium maculatum 'Leopard'

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.
Hieracium mixtum

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Hieracium pachylodes subsp. floccivelatum

A

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

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.
Hieracium pilosella

A

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

J

Sow @4°C for 3 weeks, then place @20°C.
some need stratification, some don't
Hieracium tomentosum

B

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

?

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.

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...
Hieracium villosum

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.
Hieracium waldsteinii

A

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

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
Sweetgrass takes 4 - 6 weeks for germination; 10-30% germination success
Hippeastrum 'Sydney'

*

This species needs special care as described.

A

Sow @ 20°C. Seed germinates within 3 months.
float seeds in shallow dish of water for several weeks; pot up when radicle appears
Hippophae rhamnoides

4

G

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

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Hornungia alpina ‘Icecube’

A

Sow @ 20°C. Seed germinates within 3 months.
Hosta 'Let's Streak'

A

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

A

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

A

Sow @ 20°C. Seed germinates within 3 months.
Hosta 'Abiqua Drinking Gourd'

A

Sow @ 20°C. Seed germinates within 3 months.
Hosta 'Antioch'

A

Sow @ 20°C. Seed germinates within 3 months.
Hosta 'August Moon'

A

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