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Incarvillea olgae

Princess Trumpet-flower

Family BignoniaceaeGenus Incarvillea

Pale pink trumpet flowers on thin branching stems
FlowerAgnieszka Kwiecień, NovaCC 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
Pink-purpleOrnamental Plants From Russia And Adjacent States Of The Former Soviet Union
Native range
Afghanistan, Kirgizstan, Tadzhikistan, UzbekistanGBIF 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; Ornamental Plants From Russia And Adjacent States Of The Former Soviet Union; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

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 26, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 10 days to germinate.

80% germination in 3–10 days.

Deno reads the whole genus as a dark-at-70 germinator.

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. olgae germ. 70(4/5 in 3-10 d). The seed all rotted when sown at 40.
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

  1. Cold moist stratification

    Temperature: 40°F 4°C

    The seed all rotted.

Germination happens during step 1.

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, IncarvilleaPublic domain
Show the original text
Incarvillea (Bignoniaceae). All appear to be D-70 germinators. I. olgae germ. 70(4/5 in 3-10 d). The seed all rotted when sown at 40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Incarvillea. Quoted exactly. Every value on this card comes from this record; 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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