Deno’s Garden

Cornus racemosa

Genus Cornus

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

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

Start around December 21, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 20, 2025.

  1. Clean the flesh off the seed

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    3 germinated in this phase.

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 15 months from start to sowing. Germination time not stated; 21 days assumed.

9% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cornus p. 123Public domain
Show the original text
Cornus (Cornaceae). Seeds are always in berries so that WC was performed on all seeds before planting. Grinding ahole in the seed coat had no effect in C. racemosa gave low percent germination, but unfortunately outdoor treatment has not yet been tried and probably would have been better in view of the results with other species of Cornus. Fresh seed and DS seed gave comparable results. A 70-40- 70 pattern predominated as shown by 70-40-70(3%)-40-70(9%) for fresh seed and 70- 40-70(4%) for seed DS 6 m at 70. A preliminary 3 m at 40 had little effect as shown by 40-70-40-70(3%) for fresh seed and 40-70-40(3%)-70(5%)-40-70(5%) for seed DS 6 m at 70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cornus p. 123. 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 September 22, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 21, 2025.

  1. Clean the flesh off the seed

  2. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    3 germinated in this phase.

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  7. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  8. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    5 germinated in this phase.

Steps after step 6 run on after germination.

about 18 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, Cornus p. 123Public domain
Show the original text
Cornus (Cornaceae). Seeds are always in berries so that WC was performed on all seeds before planting. Grinding ahole in the seed coat had no effect in C. racemosa gave low percent germination, but unfortunately outdoor treatment has not yet been tried and probably would have been better in view of the results with other species of Cornus. Fresh seed and DS seed gave comparable results. A 70-40- 70 pattern predominated as shown by 70-40-70(3%)-40-70(9%) for fresh seed and 70- 40-70(4%) for seed DS 6 m at 70. A preliminary 3 m at 40 had little effect as shown by 40-70-40-70(3%) for fresh seed and 40-70-40(3%)-70(5%)-40-70(5%) for seed DS 6 m at 70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cornus p. 123. 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, 1993

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

Start around December 21, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 20, 2025.

  1. Clean the flesh off the seed

  2. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 15 months from start to sowing. Germination time not stated; 21 days assumed.

4% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cornus p. 123Public domain
Show the original text
Cornus (Cornaceae). Seeds are always in berries so that WC was performed on all seeds before planting. Grinding ahole in the seed coat had no effect in C. racemosa gave low percent germination, but unfortunately outdoor treatment has not yet been tried and probably would have been better in view of the results with other species of Cornus. Fresh seed and DS seed gave comparable results. A 70-40- 70 pattern predominated as shown by 70-40-70(3%)-40-70(9%) for fresh seed and 70- 40-70(4%) for seed DS 6 m at 70. A preliminary 3 m at 40 had little effect as shown by 40-70-40-70(3%) for fresh seed and 40-70-40(3%)-70(5%)-40-70(5%) for seed DS 6 m at 70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cornus p. 123. 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 4

DerivedN. C. Deno, 1993

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

Start around March 21, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 20, 2026.

  1. Clean the flesh off the seed

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 12 months from start to sowing. Germination time not stated; 21 days assumed.

3% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cornus p. 123Public domain
Show the original text
Cornus (Cornaceae). Seeds are always in berries so that WC was performed on all seeds before planting. Grinding ahole in the seed coat had no effect in C. racemosa gave low percent germination, but unfortunately outdoor treatment has not yet been tried and probably would have been better in view of the results with other species of Cornus. Fresh seed and DS seed gave comparable results. A 70-40- 70 pattern predominated as shown by 70-40-70(3%)-40-70(9%) for fresh seed and 70- 40-70(4%) for seed DS 6 m at 70. A preliminary 3 m at 40 had little effect as shown by 40-70-40-70(3%) for fresh seed and 40-70-40(3%)-70(5%)-40-70(5%) for seed DS 6 m at 70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cornus p. 123. 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.