Deno’s Garden

Digitalis viridiflora

Genus Digitalis

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Low Rated by us, not by the source.

Start around March 1, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 35 days to germinate.

100% germination in 14–35 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Digitalis p. 29Public domain
Show the original text
Digitalis (Scrophulariaceae). , D. viridiflora germ. 70D(100% in 2-5 w) and 40-70D(100% on 3rd d). Seeds DS 1 y germ. 70D(84% in 3-5 d) showing a minor decline in percent germination, but a significant increase in the rate of germination.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Digitalis p. 29. 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 October 4, 2026 for a May 3 last frost.

  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. Then 3 days to germinate.

100% germination in 3 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Digitalis p. 29Public domain
Show the original text
Digitalis (Scrophulariaceae). , D. viridiflora germ. 70D(100% in 2-5 w) and 40-70D(100% on 3rd d). Seeds DS 1 y germ. 70D(84% in 3-5 d) showing a minor decline in percent germination, but a significant increase in the rate of germination.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Digitalis p. 29. 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 3

DerivedN. C. Deno, 1998

Difficulty Low Rated by us, not by the source.

Start around April 1, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 31, 2026.

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

about 12 months from start to sowing. Then 5 days to germinate.

84% germination in 3–5 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Digitalis p. 29Public domain
Show the original text
Digitalis (Scrophulariaceae). , D. viridiflora germ. 70D(100% in 2-5 w) and 40-70D(100% on 3rd d). Seeds DS 1 y germ. 70D(84% in 3-5 d) showing a minor decline in percent germination, but a significant increase in the rate of germination.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Digitalis p. 29. 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.