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Digitalis viridiflora

Green-flowered Foxglove

Family PlantaginaceaeGenus Digitalis

Several upright spikes of small creamy-yellow bells along green stems with narrow leaves
FlowerGhislain118 (AD) http://www.fleurs-des-montagnes.netCC BY-SA 3.0

About the plant

What it is and where it grows — not part of any germination protocol.

Habit
perennialPlants of the World Online
Flower
Greenish-yellowWikipedia
Native range
Albania, Bulgaria, Greece, NW. Balkan Pen., Türkiye-in-EuropeGBIF Backbone Taxonomy

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; Wikipedia — Wikipedia contributors; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

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 January 2, 2027 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 3 months from start to step 2. Germination happens during step 2, in 3 days.

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.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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