Deno’s Garden

Androsace obtusifolia

Genus Androsace

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty High 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.

20% germination in 42 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Androsace p. 93Public domain
Show the original text
Androsace (Primulaceae). The book "Androsace? by G.F. Smith and D. Lowe is devoted entirely to the genus. The only specific information on seed germination is that a low T cycle is not necessary which is not entirely in accord with the present work. The genus is divided into four sections: Pseudoprimula (P) which resemble Primula, Chamaejasme (C) which are mats of rosettes spreading by runners, Aretia (Ar) which are high alpine cushions, and Andraspis (An) which are winter annuals of lower elevation. The section is indicated for each species. Most of the data was obtained before the standardization of experiments. A. obtusifolia (Ar) germ. 40(3/15 in 6th w) and none in 70D and 70D GA-3.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Androsace p. 93. 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. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Androsace p. 93Public domain
Show the original text
Androsace (Primulaceae). The book "Androsace? by G.F. Smith and D. Lowe is devoted entirely to the genus. The only specific information on seed germination is that a low T cycle is not necessary which is not entirely in accord with the present work. The genus is divided into four sections: Pseudoprimula (P) which resemble Primula, Chamaejasme (C) which are mats of rosettes spreading by runners, Aretia (Ar) which are high alpine cushions, and Andraspis (An) which are winter annuals of lower elevation. The section is indicated for each species. Most of the data was obtained before the standardization of experiments. A. obtusifolia (Ar) germ. 40(3/15 in 6th w) and none in 70D and 70D GA-3.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Androsace p. 93. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.