Deno’s Garden

Iris pumila

Genus Iris

Protocol

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

  1. Cold moist stratification

    Temperature: 40°F 4°C

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

25% germination.

This source doesn't state how long.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Iris p. 50Public domain
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Iris (Iridaceae). The Aril Iris including Juno have been one of the most difficult groups to germinate. Section VI is devoted to this problem. Alternating cycles means alternating between 3 m at 40 and 3 m at 70 (just a reminder). I. attica germ. 1/4 in 70D after 4 y of alternating cycles and 1/4 at 40 a yéar later.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Iris p. 50. 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.