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Polygala calcarea

Chalk Milkwort

Family PolygalaceaeGenus Polygala

Bright blue flowers with fringed white centers, between rounded leaves beside a rock
FlowerStéphane TassonGNU GPL

About the plant

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

Habit
perennialPlants of the World Online
Flower
Deep blueWikipedia
Native range
Belgium, France, Germany, Great Britain, Italy, Spain and elsewhereGBIF 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

  • Calcarea means "relating to lime", though the chalk milkwort will grow in a range of soils. It forms delicate evergreen mats about 5 cm tall with spikes of vivid deep blue flowers in spring. Wikipedia: Polygala calcarea

Protocol

DerivedN. C. Deno, 1993

Difficulty Very high Rated by us, not by the source.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 35 days to germinate.

8% germination in 35 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Polygala p. 195Public domain
Show the original text
Polygala (Polygalaceae). Seed is difficult to collect because it ripens over an extended period. The samples of seed were thus small. In view of the photoresponses in P. calcarea germ. 70L(1/13 in 5th w) and 70D-40-70D(1/1 1 in 5th w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Polygala p. 195. 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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