Mendel’s Gardens

Incarvillea olgae

Princess Trumpet-Flower

Family BignoniaceaeGenus Incarvillea

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.

No stated waiting before sowing.

0% germination.

This source doesn't state how long.

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.