Deno’s Garden

Ratibida columnifera

Genus Ratibida

Protocol

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    50 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 28 days to germinate.

50% germination in 28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Ratibida p. 203Public domain
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Ratibida (Asteraceae). A. columnifera germ. 100% in 6-8 d in either 70D ot 70L and 40(50% in 4th w)-70(50% on 2nd d).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Ratibida p. 203. 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.