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Papaver cambricum

Poppy · Welsh Poppy

Family PapaveraceaeGenus Papaver

Yellow poppies on thin wiry stems with nodding green buds, growing from a clump of deeply cut leaves against pale limestone.
FlowerLBM1948CC BY-SA 4.0

About the plant

What it is and where it grows — not part of any germination protocol.

Habit
perennialPlants of the World Online
Flower
Yellow, orangeWikipedia
Native range
France, Great Britain, Ireland, SpainGBIF Backbone Taxonomy

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; Wikipedia — Wikipedia contributors; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Worth knowing

  • The Welsh poppy, long called Meconopsis cambrica. Since 2006 it has been the basis of the logo of the Welsh party Plaid Cymru. Wikipedia: Papaver cambricum

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 September 18, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 17, 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 6 months from start to step 3. Germination happens during step 3, in 20 days.

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 March 15, 2027 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.

Germination happens during step 1; 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.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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