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Astrantia carniolica

Carnic Masterwort

Family ApiaceaeGenus Astrantia

Deep crimson pincushion flower heads on tall dark stems, rising from broad ribbed leaves in a crowded shaded border.
The whole plantpeganum from Small Dole, EnglandCC BY-SA 2.0

About the plant

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

Habit
perennialPlants of the World Online
Flower
WhiteWikipedia

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.

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around November 10, 2026 for a May 3 last frost.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

about 3 months from start to step 2. Germination happens during step 2, in 56 days.

100% germination in 42–56 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Astrantia p. 16Public domain
Show the original text
Astrantia (Apiaceae). Larger samples of A. carniolica rubra germ. 70D-40(100% in 6-8 w) and 40-70D(4/8 in 2nd w)- 40(4/8 in 10th w): Light had no effect.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Astrantia p. 16. 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 December 22, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

  2. Warm moist stratification

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

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

    4/8 germinated in this phase.

Steps after step 2 run on after germination.

about 3 months from start to step 2. Germination happens during step 2, in 14 days.

50% germination in 14 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Astrantia p. 16Public domain
Show the original text
Astrantia (Apiaceae). Larger samples of A. carniolica rubra germ. 70D-40(100% in 6-8 w) and 40-70D(4/8 in 2nd w)- 40(4/8 in 10th w): Light had no effect.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Astrantia p. 16. 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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