Deno’s Garden

Papaver cambricum

Genus Papaver

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 June 20, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 19, 2026.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 9 months from start to sowing. Then 20 days to germinate.

24% germination in 3–20 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Meconopsis p. 177Public domain
Show the original text
Meconopsis (Papaveraceae). M. cambrica seed collected in June germ. differently from seed collected in October. June seed germ. 70-40-70(24% in 3-20 d) and October seed germ. 70(24%)- 40-70(4%). Germination failed on all seed sown at 40 and all DS seed.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Meconopsis p. 177. 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 December 15, 2026 for a May 3 last frost.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    4 germinated in this phase.

Steps after step 1 run on after germination.

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

24% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Meconopsis p. 177Public domain
Show the original text
Meconopsis (Papaveraceae). M. cambrica seed collected in June germ. differently from seed collected in October. June seed germ. 70-40-70(24% in 3-20 d) and October seed germ. 70(24%)- 40-70(4%). Germination failed on all seed sown at 40 and all DS seed.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Meconopsis p. 177. 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.