Deno’s Garden

Dodecatheon pulchellum

Genus Dodecatheon

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Germination time not stated; 21 days assumed.

50% germination.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Dodecatheon p. 31Public domain
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Dodecatheon (Primulaceae). D. pulchellum germ. 70D(50%) and 40- 70D(50%)(2nd Ed.). The sample studied by KR required GA-3 or GA-4 with CK for best germination (55% in 3rd w), and none germ. without gibberellins. The discrepancy is possibly due to the use of oscillating T (50-80) by KR. There is also a question of the identity of her commercial sample.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Dodecatheon p. 31. 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, 1998

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. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

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

about 6 months from start to sowing. Germination time not stated; 21 days assumed.

50% germination.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Dodecatheon p. 31Public domain
Show the original text
Dodecatheon (Primulaceae). D. pulchellum germ. 70D(50%) and 40- 70D(50%)(2nd Ed.). The sample studied by KR required GA-3 or GA-4 with CK for best germination (55% in 3rd w), and none germ. without gibberellins. The discrepancy is possibly due to the use of oscillating T (50-80) by KR. There is also a question of the identity of her commercial sample.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Dodecatheon p. 31. 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.