Deno’s Garden

Nigella hispanica

Genus Nigella

Two sources report 5 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Low Rated by us, not by the source.

Start around February 8, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

No stated waiting before sowing. Then 56 days to germinate.

100% germination in 21–56 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nigella p. 50Public domain
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Nigella (Ranunculaceae). Data is now more complete. N. hispanica germ. 70D(6%)-40(75% in 3-5 w), 70L(100% in 1-3 w), and 40(100% in 3-8 w).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nigella 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 2

DerivedN. C. Deno, 1998

Difficulty Moderate 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

    6 germinated in this phase.

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

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

75% germination in 21–35 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nigella p. 50Public domain
Show the original text
Nigella (Ranunculaceae). Data is now more complete. N. hispanica germ. 70D(6%)-40(75% in 3-5 w), 70L(100% in 1-3 w), and 40(100% in 3-8 w).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nigella 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, 1998

Difficulty Low Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 21 days to germinate.

100% germination in 7–21 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Nigella p. 50Public domain
Show the original text
Nigella (Ranunculaceae). Data is now more complete. N. hispanica germ. 70D(6%)-40(75% in 3-5 w), 70L(100% in 1-3 w), and 40(100% in 3-8 w).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Nigella 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 4

DerivedN. C. Deno, 1996

Difficulty Very high Rated by us, not by the source.

Start around March 28, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 8 days to germinate.

6% germination in 6–8 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Nigella p. 61Public domain
Show the original text
Nigella (Ranunculaceae). N. hispanica germ. 70L(45% on 9th d) and 70D(6% in 6-8 d).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Nigella p. 61. 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 5

DerivedN. C. Deno, 1996

Difficulty Moderate 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.

45% germination in 9 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Nigella p. 61Public domain
Show the original text
Nigella (Ranunculaceae). N. hispanica germ. 70L(45% on 9th d) and 70D(6% in 6-8 d).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Nigella p. 61. 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.