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Delphinium consolida

Field Larkspur · Forking Larkspur · Branching Larkspur

Family RanunculaceaeGenus Delphinium

Spurred violet-purple flowers on a slender branching stem
FlowerBerndHCC BY-SA 2.5

About the plant

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

Habit
annualPlants of the World Online
Flower
Dark blue, purpleWikipedia
Native range
Albania, Altay, Austria, Baltic States, Belarus, Belgium and elsewhereGBIF 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, 1996

Difficulty High Rated by us, not by the source.

Start around December 1, 2026 for a May 3 last frost.

  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 3 months from start to step 2. Germination happens during step 2, in 35 days.

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 September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 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 6 months from start to step 3. Germination happens during step 3, in 21 days.

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 December 15, 2026 for a May 3 last frost.

  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 3 months from start to step 2. Germination happens during step 2; 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.

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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