Deno’s Garden

Rosa multiflora

Genus Rosa

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 November 10, 2026 for a May 3 last frost.

  1. Clean the flesh off the seed

  2. Leach in running water

    Duration: 7 days

    Washed and cleaned daily for 7 days.

  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

Steps after step 3 run on after germination.

about 3 months from start to sowing. Then 49 days to germinate.

26% germination in 35–49 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Rosa p. 207Public domain
Show the original text
Rosa (Rosaceae). Germination -occurs largely at 40 and extends in an erratic manner over several cycles. All seed was WC 7 d. Although the seed coat is hard, grinding a hole through it did not initiate germination. In view of the results with two of the four species, outdoor treatment should be tried on the other two. A. multiflora germ. best in 40(26% in 5-7 w)-70(3%)-40-70. Germination is less in 70(8%)-40-70(3%)-40-70(3%) and less in seed sown outdoors (6% germ. in April). Seed DS 6 m at 70 or 40 was all dead.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Rosa p. 207. 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 8, 2026 for a May 3 last frost.

  1. Clean the flesh off the seed

  2. Leach in running water

    Duration: 7 days

    Washed and cleaned daily for 7 days.

  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

    3 germinated in this phase.

  6. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  7. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    3 germinated in this phase.

Steps after step 3 run on after germination.

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

8% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Rosa p. 207Public domain
Show the original text
Rosa (Rosaceae). Germination -occurs largely at 40 and extends in an erratic manner over several cycles. All seed was WC 7 d. Although the seed coat is hard, grinding a hole through it did not initiate germination. In view of the results with two of the four species, outdoor treatment should be tried on the other two. A. multiflora germ. best in 40(26% in 5-7 w)-70(3%)-40-70. Germination is less in 70(8%)-40-70(3%)-40-70(3%) and less in seed sown outdoors (6% germ. in April). Seed DS 6 m at 70 or 40 was all dead.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Rosa p. 207. 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.