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Digitalis canariensis

Canary Island Foxglove · Canary Islands Foxglove

Family PlantaginaceaeGenus Digitalis

A dense spike of orange tubular flowers above a whorl of long toothed leaves on a mossy bank
FlowerjaviersanpCC BY-SA 3.0

About the plant

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

Habit
subshrubPlants of the World Online
Flower
Orange-reddishWikipedia
Native range
Canary Is.GBIF 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.

Two sources report three treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around March 15, 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

    6 germinated in this phase.

Steps after step 1 run on after germination.

Germination happens during step 1; time not stated, 21 days assumed.

12% germination.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Isoplexis p. 40Public domain
Show the original text
Isoplexis (Scrophulariaceae). I. canariensis had germ. 100% in 8-16 d in either 70D or 70L (1st Suppl.). It is now found that a prior 3 m at 40 is deleterious as shown by 40(12%)-70D(6%).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Isoplexis p. 40. 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, 1996

Difficulty Low Rated by us, not by the source.

Start around March 20, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 16 days to germinate.

100% germination in 8–16 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Isoplexis p. 50Public domain
Show the original text
Isoplexis (Scrophulariaceae). I. canariensis germ. 70L(100% on 9th d) and 70D(100% in 8-16 d). Germination was fewer and slower in 70 GA-3.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Isoplexis 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.

Protocol 3

DerivedN. C. Deno, 1996

Difficulty Low Rated by us, not by the source.

Start around March 27, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 9 days to germinate.

100% germination in 9 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Isoplexis p. 50Public domain
Show the original text
Isoplexis (Scrophulariaceae). I. canariensis germ. 70L(100% on 9th d) and 70D(100% in 8-16 d). Germination was fewer and slower in 70 GA-3.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Isoplexis 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.

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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