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About the plant What it is and where it grows — not part of any germination protocol.
Habit perennial Plants of the World Online
Flower Pale mauve Wikipedia
Native range Austria, Italy, NW. Balkan Pen. GBIF 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 Tufted horned rampion is the only species in its genus; it was formerly included in Phyteuma. Only 8 cm tall, it bears dense heads of pale mauve flowers with prominent purple tips in summer. Wikipedia: Physoplexis This source reports three treatments. All are shown.
Protocol 1 N. C. Deno, 1993 Difficulty Low Rated by us, not by the source.
Start around March 15, 2027 for a May 3 last frost.
1 2 Sow and cover
Temperature: 70°F 21°C · Light: dark
No stated waiting before sowing. Then 21 days to germinate.
82% germination in 21 days.
Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Physoplexis p. 193Public domain Show the original text Physoplexis (Campanulaceae). P. comosum germination was dramatically stimulated by GA-3, and the seedlings were normal and healthy. Seeds germ. 70D GA-3(82% in 3rd w), 70D(9% in 2-6 w), 70L(none), 40-70(none), and none in outdoor treatment. A prior 4 w in 70D or 70L had no effect, but a prior 3 m at 40 slowed down the rate and reduced the percent germination. Seed Germination Theory and Practice, 2nd ed., Ch. 20, Physoplexis p. 193. 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 N. C. Deno, 1993 Difficulty Very high Rated by us, not by the source.
Start around February 22, 2027 for a May 3 last frost.
1 Sow and cover
Temperature: 70°F 21°C · Light: dark
No stated waiting before sowing. Then 42 days to germinate.
9% germination in 14–42 days.
Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Physoplexis p. 193Public domain Show the original text Physoplexis (Campanulaceae). P. comosum germination was dramatically stimulated by GA-3, and the seedlings were normal and healthy. Seeds germ. 70D GA-3(82% in 3rd w), 70D(9% in 2-6 w), 70L(none), 40-70(none), and none in outdoor treatment. A prior 4 w in 70D or 70L had no effect, but a prior 3 m at 40 slowed down the rate and reduced the percent germination. Seed Germination Theory and Practice, 2nd ed., Ch. 20, Physoplexis p. 193. 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 3 N. C. Deno, 1993 Difficulty Very high Rated by us, not by the source.
1 Sow outdoors and leave it
Nothing germinated outdoors.
No stated waiting before sowing.
0% germination.
This source doesn't state how long step 1 lasts.
Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Physoplexis p. 193Public domain Show the original text Physoplexis (Campanulaceae). P. comosum germination was dramatically stimulated by GA-3, and the seedlings were normal and healthy. Seeds germ. 70D GA-3(82% in 3rd w), 70D(9% in 2-6 w), 70L(none), 40-70(none), and none in outdoor treatment. A prior 4 w in 70D or 70L had no effect, but a prior 3 m at 40 slowed down the rate and reduced the percent germination. Seed Germination Theory and Practice, 2nd ed., Ch. 20, Physoplexis p. 193. 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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