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Incarvillea arguta

Himalayan Gloxinia

Family BignoniaceaeGenus Incarvillea

Also published as Incarvillea diffusa. You are in the right place.

A spreading bush carrying many pink trumpet flowers
The whole plantKenraizCC 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
Pale red, purple-redFlora of China

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; Flora of China — Wu Zhengyi, Peter H. Raven and Hong Deyuan (eds.).

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around March 27, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: either

No stated waiting before sowing. Then 9 days to germinate.

100% germination in 6–9 days.

Light made no difference: 100% either way.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, IncarvilleaPublic domain
Show the original text
Incarvillea (Bignoniaceae). All appear to be D-70 germinators. I. arguta germ. 100% in 6-9 d in either 70D or 70L and 40-70(92% in 2-6 d).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Incarvillea. 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 Low Rated by us, not by the source.

Start around March 30, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

  2. Warm moist stratification

    Temperature: 70°F 21°C

    92% germinated after the move, in 2-6 days.

Germination happens during step 2, in 6 days.

92% germination in 2–6 days.

Faster after the move, but it gives up eight percent to do it.

This source doesn't state how long step 1 lasts.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, IncarvilleaPublic domain
Show the original text
Incarvillea (Bignoniaceae). All appear to be D-70 germinators. I. arguta germ. 100% in 6-9 d in either 70D or 70L and 40-70(92% in 2-6 d).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Incarvillea. 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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