Deno’s Garden

Delphinium consolida

Genus Delphinium

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around September 3, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 2, 2026.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 6 months from start to sowing. Then 35 days to germinate.

20% germination in 21–35 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Delphinium p. 38Public domain
Show the original text
Delphinium (Ranunculaceae). D. consolida germ. 70D-40(20% in 3-5 w), 70L-40(10%), and 40-70D-40(13% in 3rd w). None germ. in 70 GA-3, 40-70D, or 40-70L.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Delphinium p. 38. 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 High Rated by us, not by the source.

Start around June 19, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 18, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 9 months from start to sowing. Then 21 days to germinate.

13% germination in 21 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Delphinium p. 38Public domain
Show the original text
Delphinium (Ranunculaceae). D. consolida germ. 70D-40(20% in 3-5 w), 70L-40(10%), and 40-70D-40(13% in 3rd w). None germ. in 70 GA-3, 40-70D, or 40-70L.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Delphinium p. 38. 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 High Rated by us, not by the source.

Start around September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 2026.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: light

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 6 months from start to sowing. Germination time not stated; 21 days assumed.

10% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Delphinium p. 38Public domain
Show the original text
Delphinium (Ranunculaceae). D. consolida germ. 70D-40(20% in 3-5 w), 70L-40(10%), and 40-70D-40(13% in 3rd w). None germ. in 70 GA-3, 40-70D, or 40-70L.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Delphinium p. 38. 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.