Deno’s Garden

Corylopsis spicata

Genus Corylopsis

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around March 22, 2027 for a May 3 last frost.

  1. Gibberellic acid soak

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 14 days to germinate.

18% germination in 14 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Corylopsis p. 125Public domain
Show the original text
Corylopsis (Hamamelldaceae). C. spicata germ. best after DS for 6 m, removing the husks, and placing outdoors. These germ. 15% in June when placed outdoors in mid-May. These seeds also germ. 40(5%)-70, 70D GA-3(18% in 2nd w), and 70D(none). It is not known whether removal of the husks is a factor because it was extremely difficult to remove these husks in fresh seed. The GA-3 seedlings were badly etiolated.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Corylopsis p. 125. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

Protocol 2

DerivedN. C. Deno, 1993

Difficulty Very high Rated by us, not by the source.

Start around December 15, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

Steps after step 1 run on after germination.

about 3 months from start to sowing. Germination time not stated; 21 days assumed.

5% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Corylopsis p. 125Public domain
Show the original text
Corylopsis (Hamamelldaceae). C. spicata germ. best after DS for 6 m, removing the husks, and placing outdoors. These germ. 15% in June when placed outdoors in mid-May. These seeds also germ. 40(5%)-70, 70D GA-3(18% in 2nd w), and 70D(none). It is not known whether removal of the husks is a factor because it was extremely difficult to remove these husks in fresh seed. The GA-3 seedlings were badly etiolated.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Corylopsis p. 125. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.