Deno’s Garden

Cornus canadensis

Genus Cornus

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Low Rated by us, not by the source.

Start around December 7, 2026 for a May 3 last frost.

  1. Clean the flesh off the seed

  2. Gibberellic acid soak

  3. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 119 days to germinate.

100% germination in 21–119 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cornus p. 33Public domain
Show the original text
Cornus (Cornaceae). C. canadensis germ. 70 GA-3 (100% in 3-17 w) and 40-70 GA-3(45% in 6-11 w). None germ. in 70D-40, 40-70, or outdoor treatment. A prior 3 m at 40 or 70 was detrimental and such treatments reduced germination to 35-40%. This is the first member of this famiiy to require GA-3, and the second species with seeds in a fruit that required GA-3 (the other was Alangium platanifolium). Seeds that had been WC and cleaned germ. 70 GA*3(85% in 2-5 w) and 70D(none) after 2 y DS showing that GA-3 was still required and that there had been littie dying of the seeds. The same seeds DS 2 y in the dried berries germ. 70 GA-3(44% in 5-7 w) and 70D(none) showing that it is actuallyjess preferable to store the seed in the dried berries. Incidentally, there are efforts to change the name to Chamaeperidymenum. To replace an old established name with a new name and such a cumbersome one at that only harnis communication. Anyone can see that the growth habit is somewhat different than other Cornus, but this in no way justifies an intellectually vacuous publication.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cornus p. 33. 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, 1996

Difficulty Moderate Rated by us, not by the source.

Start around July 23, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 22, 2026.

  1. Clean the flesh off the seed

  2. Gibberellic acid soak

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 6 months from start to sowing. Then 77 days to germinate.

45% germination in 42–77 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cornus p. 33Public domain
Show the original text
Cornus (Cornaceae). C. canadensis germ. 70 GA-3 (100% in 3-17 w) and 40-70 GA-3(45% in 6-11 w). None germ. in 70D-40, 40-70, or outdoor treatment. A prior 3 m at 40 or 70 was detrimental and such treatments reduced germination to 35-40%. This is the first member of this famiiy to require GA-3, and the second species with seeds in a fruit that required GA-3 (the other was Alangium platanifolium). Seeds that had been WC and cleaned germ. 70 GA*3(85% in 2-5 w) and 70D(none) after 2 y DS showing that GA-3 was still required and that there had been littie dying of the seeds. The same seeds DS 2 y in the dried berries germ. 70 GA-3(44% in 5-7 w) and 70D(none) showing that it is actuallyjess preferable to store the seed in the dried berries. Incidentally, there are efforts to change the name to Chamaeperidymenum. To replace an old established name with a new name and such a cumbersome one at that only harnis communication. Anyone can see that the growth habit is somewhat different than other Cornus, but this in no way justifies an intellectually vacuous publication.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cornus p. 33. 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 3

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around February 16, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on February 15, 2025.

  1. Clean the flesh off the seed

  2. Dry storage

    Duration: 730 daysTemperature: 70°F 21°C

  3. Gibberellic acid soak

  4. Sow and cover

    Temperature: 70°F 21°C

about 2 years from start to sowing. Then 49 days to germinate.

44% germination in 35–49 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cornus p. 33Public domain
Show the original text
Cornus (Cornaceae). C. canadensis germ. 70 GA-3 (100% in 3-17 w) and 40-70 GA-3(45% in 6-11 w). None germ. in 70D-40, 40-70, or outdoor treatment. A prior 3 m at 40 or 70 was detrimental and such treatments reduced germination to 35-40%. This is the first member of this famiiy to require GA-3, and the second species with seeds in a fruit that required GA-3 (the other was Alangium platanifolium). Seeds that had been WC and cleaned germ. 70 GA*3(85% in 2-5 w) and 70D(none) after 2 y DS showing that GA-3 was still required and that there had been littie dying of the seeds. The same seeds DS 2 y in the dried berries germ. 70 GA-3(44% in 5-7 w) and 70D(none) showing that it is actuallyjess preferable to store the seed in the dried berries. Incidentally, there are efforts to change the name to Chamaeperidymenum. To replace an old established name with a new name and such a cumbersome one at that only harnis communication. Anyone can see that the growth habit is somewhat different than other Cornus, but this in no way justifies an intellectually vacuous publication.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cornus p. 33. 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.