Deno’s Garden

Ipomopsis spicata

Genus Ipomopsis

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 2026.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: either

    29 germinated in this phase.

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

about 6 months from start to sowing. Then 21 days to germinate.

36% germination in 21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Ipomopsis p. 156Public domain
Show the original text
Ipomopsis (Polemoniaceae). I. spicata germ. 70(29% in 5-10 d)-40(36% in 3rd w) and 40(22% in 12th w)- 70(22% in 8th d). Light had no effect.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Ipomopsis p. 156. 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 High Rated by us, not by the source.

Start around October 13, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: either

    22 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 84 days to germinate.

22% germination in 84 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Ipomopsis p. 156Public domain
Show the original text
Ipomopsis (Polemoniaceae). I. spicata germ. 70(29% in 5-10 d)-40(36% in 3rd w) and 40(22% in 12th w)- 70(22% in 8th d). Light had no effect.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Ipomopsis p. 156. 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.