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ONTARIO ROCK GARDEN & HARDY PLANT SOCIETY |
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SEEDEX
2007 |
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If
you have suggestions for improving this guide or additional
information about germination, |
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WHAT OUR TEMPERATURE DESIGNATIONS MEAN |
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4C |
Either place seeds outdoors to be exposed to a wide range of winter temperatures including freezing or put them in a refrigerator (not a deep freezer). |
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10C |
Either place seeds outdoors in spring or fall or choose a very cool indoor location. |
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20C |
Either place seeds in a sheltered outdoor location in mid to late spring or grow at room temperature. |
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SYMBOLS |
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* |
This species needs special care as described. |
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? |
We have no information on the germination of this species. If "?" is followed by a code, the code reflects an informed guess. Let us know what is successful. |
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! |
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. |
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LETTERS |
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A |
Sow @ 20C. Seed germinates within 3 months. |
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B |
Sow @ 20C. If seed does not germinate within 3 months, try 4C for 1-2 months, then 20C again. |
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C |
Sow @ 20C for 3 months, then place @ 4C for 3 months. |
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D |
Use repeated cycles of 20C, then 4C for 3 months each. Germination is very prolonged. |
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E |
Sow @ 20C for 6 weeks, then place @ 4C for 6 weeks, then slowly raise temperature to 10C for 6 weeks. If there is no germination, repeat the cycle. |
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F |
Sow @ 4C. |
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G |
Sow @ 4C for 3 months, then place @ 20C for 3 months. |
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H |
Use repeated cycles of 4C, then 20C for 3 months each. Germination is very prolonged. |
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J |
Sow @4C for 3 weeks, then place @20C. |
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K |
Sow @ 10C. |
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L |
Expose to fluctuating outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in spring. |
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M |
Store seed in moist medium @ 4C for 3 months, then @ 20C until radicle appears. Repeat cycle until leaf appears. |
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N |
Sow directly in garden. |
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NUMBERS |
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1 |
Resents transplanting. |
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2 |
Requires darkness. |
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3 |
Requires light. |
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4 |
Germination is improved by using GA3. |
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5 |
Germination is successful only when GA3 is used. |
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6 |
Requires scarification. Nick or rub between sheets of sandpaper. |
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7 |
Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard floaters and water. |
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8 |
Pulpy coat inhibits germination. Remove by soaking and rinsing in clean water daily for 7 days. Discard water. |
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9 |
Tails may inhibit germination. Remove them. |
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GA - 3 |
GA-3 has been
shown to promote germination of a few species. |
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Web Admistrator: Peter Gill 11/07 |