Deno’s Garden

Tulipa clusiana

Genus Tulipa

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 February 22, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

No stated waiting before sowing. Then 42 days to germinate.

100% germination in 28–42 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Tulipa p. 226Public domain
Show the original text
Tulipa (Llllaceae). Germination takes place either at 40 or after a 3 m period at 40: Preliminary results indicate that the seedlings must grow at low temperatures as a quick shift to 70 generally led to rotting starting at the tip of the radicle. Outdoor treatment needs to be tried not only for the germination but also for the cotyledon development. GA-3 probably has no effect in this genus. T. stellata germ. 70-40(6/7 in 6-10 w) and 40(7/7 in 4-6 w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Tulipa p. 226. 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 Moderate Rated by us, not by the source.

Start around July 30, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 29, 2026.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 6 months from start to sowing. Then 70 days to germinate.

86% germination in 42–70 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Tulipa p. 226Public domain
Show the original text
Tulipa (Llllaceae). Germination takes place either at 40 or after a 3 m period at 40: Preliminary results indicate that the seedlings must grow at low temperatures as a quick shift to 70 generally led to rotting starting at the tip of the radicle. Outdoor treatment needs to be tried not only for the germination but also for the cotyledon development. GA-3 probably has no effect in this genus. T. stellata germ. 70-40(6/7 in 6-10 w) and 40(7/7 in 4-6 w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Tulipa p. 226. 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.