Deno’s Garden

Digitalis canariensis

Genus Digitalis

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 December 15, 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

    6 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Germination 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
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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.