Mendel’s Gardens

Incarvillea diffusa

Family BignoniaceaeGenus Incarvillea

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

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.

No stated waiting before sowing. Then 6 days to germinate.

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.

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.