Deno’s Garden

Cornus alternifolia

Genus Cornus

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

  1. Clean the flesh off the seed

  2. Leach in running water

    Duration: 14 days

    Washed and cleaned daily for 2 weeks.

  3. Sow outdoors and leave it

    Up in March.

14 days from start to sowing.

65% germination.

This source doesn't state how long.

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. alternifolia germ. best in outdoor treatment. Seed was collected in August and WC for 2 w. This seed germ. 65% in March in outdoor treatment. The next best was 40-70-40(4%)-70(14%)-40-70(26% in 2 d-4 w)-40-70(6%). All other treatments germ. 0-10%, but many of these were carried through only three cycles, and it is apparent that germination could have been continuing out to the the seventh cycle and beyond. DS is injurious. After a year in various treatments including outdoors, seeds DS 6 m at 70 or 40 in the WC state germ. only 0-2% and seeds DS in the dried berries germ. only o-10%. .
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 High Rated by us, not by the source.

Start around September 1, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 31, 2025.

  1. Clean the flesh off the seed

  2. Leach in running water

    Duration: 14 days

    Washed and cleaned daily for 2 weeks.

  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

    4 germinated in this phase.

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    14 germinated in this phase.

  7. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  8. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  9. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  10. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    6 germinated in this phase.

Steps after step 8 run on after germination.

about 1.5 years from start to sowing. Then 28 days to germinate.

26% germination in 2–28 days.

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. alternifolia germ. best in outdoor treatment. Seed was collected in August and WC for 2 w. This seed germ. 65% in March in outdoor treatment. The next best was 40-70-40(4%)-70(14%)-40-70(26% in 2 d-4 w)-40-70(6%). All other treatments germ. 0-10%, but many of these were carried through only three cycles, and it is apparent that germination could have been continuing out to the the seventh cycle and beyond. DS is injurious. After a year in various treatments including outdoors, seeds DS 6 m at 70 or 40 in the WC state germ. only 0-2% and seeds DS in the dried berries germ. only o-10%. .
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.