Deno’s Garden

Nigella damascena

Genus Nigella

Two sources report 9 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Low Rated by us, not by the source.

Start around February 22, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

No stated waiting before sowing. Then 42 days to germinate.

90% germination in 21–42 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
Show the original text
Nigella (Ranunculaceae). Data is now more complete. N. damascena germ. 70D(88% in 6-8 d)-40(5%)-70D(4%), 70L(62% in 1-10 w)- 40(15% in 4th w), and 40(90% in 3-6 w). HC reported that it required light and temp. 60-85. Clearly his results are not in accord with mine! N. damascena hybrid germ. 70D(40% in 1-12 w)-40(30% in 4-12 w), 70L(70% in 1-10 w)-40(30% in 8th w), and 40(32% in 3-12 w)-70D(10% in 1st 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 October 13, 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

    10 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 84 days to germinate.

32% germination in 21–84 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. damascena germ. 70D(88% in 6-8 d)-40(5%)-70D(4%), 70L(62% in 1-10 w)- 40(15% in 4th w), and 40(90% in 3-6 w). HC reported that it required light and temp. 60-85. Clearly his results are not in accord with mine! N. damascena hybrid germ. 70D(40% in 1-12 w)-40(30% in 4-12 w), 70L(70% in 1-10 w)-40(30% in 8th w), and 40(32% in 3-12 w)-70D(10% in 1st 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 Moderate Rated by us, not by the source.

Start around December 28, 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

    5 germinated in this phase.

  3. Warm moist stratification

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

    4 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 8 days to germinate.

88% germination in 6–8 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. damascena germ. 70D(88% in 6-8 d)-40(5%)-70D(4%), 70L(62% in 1-10 w)- 40(15% in 4th w), and 40(90% in 3-6 w). HC reported that it required light and temp. 60-85. Clearly his results are not in accord with mine! N. damascena hybrid germ. 70D(40% in 1-12 w)-40(30% in 4-12 w), 70L(70% in 1-10 w)-40(30% in 8th w), and 40(32% in 3-12 w)-70D(10% in 1st 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, 1998

Difficulty Moderate Rated by us, not by the source.

Start around October 27, 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

    15 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 70 days to germinate.

62% germination in 7–70 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. damascena germ. 70D(88% in 6-8 d)-40(5%)-70D(4%), 70L(62% in 1-10 w)- 40(15% in 4th w), and 40(90% in 3-6 w). HC reported that it required light and temp. 60-85. Clearly his results are not in accord with mine! N. damascena hybrid germ. 70D(40% in 1-12 w)-40(30% in 4-12 w), 70L(70% in 1-10 w)-40(30% in 8th w), and 40(32% in 3-12 w)-70D(10% in 1st 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 5

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around October 13, 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

    30 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 84 days to germinate.

40% germination in 7–84 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. damascena germ. 70D(88% in 6-8 d)-40(5%)-70D(4%), 70L(62% in 1-10 w)- 40(15% in 4th w), and 40(90% in 3-6 w). HC reported that it required light and temp. 60-85. Clearly his results are not in accord with mine! N. damascena hybrid germ. 70D(40% in 1-12 w)-40(30% in 4-12 w), 70L(70% in 1-10 w)-40(30% in 8th w), and 40(32% in 3-12 w)-70D(10% in 1st 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 6

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around October 27, 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

    30 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 70 days to germinate.

70% germination in 7–70 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. damascena germ. 70D(88% in 6-8 d)-40(5%)-70D(4%), 70L(62% in 1-10 w)- 40(15% in 4th w), and 40(90% in 3-6 w). HC reported that it required light and temp. 60-85. Clearly his results are not in accord with mine! N. damascena hybrid germ. 70D(40% in 1-12 w)-40(30% in 4-12 w), 70L(70% in 1-10 w)-40(30% in 8th w), and 40(32% in 3-12 w)-70D(10% in 1st 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 7

DerivedN. C. Deno, 1996

Difficulty Low 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.

88% 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. damascena germ. 70D(88% in 6-8 d) and 70L(30% in 9-12 d). A second sample germ. 70D{33% in 6-12 d) and 70L(10% on 9th 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 8

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around March 24, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 12 days to germinate.

30% germination in 9–12 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. damascena germ. 70D(88% in 6-8 d) and 70L(30% in 9-12 d). A second sample germ. 70D{33% in 6-12 d) and 70L(10% on 9th 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 9

DerivedN. C. Deno, 1996

Difficulty High 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.

10% 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. damascena germ. 70D(88% in 6-8 d) and 70L(30% in 9-12 d). A second sample germ. 70D{33% in 6-12 d) and 70L(10% on 9th 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.