Deno’s Garden

Rosa gallica

Genus Rosa

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around January 8, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on January 7, 2026.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

about 15 months from start to sowing. Then 3 days to germinate.

33% germination in 3 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Rosa p. 58Public domain
Show the original text
Rosa (Rosaceae). Germinations are characterized by two features. First is that germinations begin after several cycles and continue over several years. Second is that light or GA-3 have no effect. Germination may occur in either 70D or 40, but when germination occurs at 70 it-is usually within a few days after the shift to 70. R. gallica "Tuscany Superba" germ. 70D-40-70D-40-70D(1/3 on 3rd d) and 40- 70D-40-70D(1/4 on 3rd d)-40-70D(1/4 on 2nd d).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Rosa p. 58. 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, 1998

Difficulty High Rated by us, not by the source.

Start around April 8, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on April 7, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

    1/4 germinated in this phase.

Steps after step 4 run on after germination.

about 12 months from start to sowing. Then 3 days to germinate.

25% germination in 3 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Rosa p. 58Public domain
Show the original text
Rosa (Rosaceae). Germinations are characterized by two features. First is that germinations begin after several cycles and continue over several years. Second is that light or GA-3 have no effect. Germination may occur in either 70D or 40, but when germination occurs at 70 it-is usually within a few days after the shift to 70. R. gallica "Tuscany Superba" germ. 70D-40-70D-40-70D(1/3 on 3rd d) and 40- 70D-40-70D(1/4 on 3rd d)-40-70D(1/4 on 2nd d).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Rosa p. 58. 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.