Deno’s Garden

Draba densifolia

Genus Draba

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low 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. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Temperature: 40°F 4°C

about 6 months from start to sowing. Then 21 days to germinate.

100% germination in 21 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Draba p. 135Public domain
Show the original text
Draba (Brassicaceae). Most Draba are D-70 germinators. A comparison of the high germination of DS to low germination of fresh seed was given in Table 5-1. Sowing of fresh seed at 70 not only gives low germination, but is often fatal. D. densifolia germ. 70(99% in 5-11 d) and 40(100% in less than 3 w) with seed DS 6 m at 70. Germination in fresh seed is lower as shown by 40(53%)-70-40(2%) and 70-40(3%)-70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Draba p. 135. 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, 1993

Difficulty Low Rated by us, not by the source.

Start around September 26, 2026 for a May 3 last frost.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C

about 6 months from start to sowing. Then 11 days to germinate.

99% germination in 5–11 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Draba p. 135Public domain
Show the original text
Draba (Brassicaceae). Most Draba are D-70 germinators. A comparison of the high germination of DS to low germination of fresh seed was given in Table 5-1. Sowing of fresh seed at 70 not only gives low germination, but is often fatal. D. densifolia germ. 70(99% in 5-11 d) and 40(100% in less than 3 w) with seed DS 6 m at 70. Germination in fresh seed is lower as shown by 40(53%)-70-40(2%) and 70-40(3%)-70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Draba p. 135. 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, 1993

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

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    2 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.

53% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Draba p. 135Public domain
Show the original text
Draba (Brassicaceae). Most Draba are D-70 germinators. A comparison of the high germination of DS to low germination of fresh seed was given in Table 5-1. Sowing of fresh seed at 70 not only gives low germination, but is often fatal. D. densifolia germ. 70(99% in 5-11 d) and 40(100% in less than 3 w) with seed DS 6 m at 70. Germination in fresh seed is lower as shown by 40(53%)-70-40(2%) and 70-40(3%)-70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Draba p. 135. 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, 1993

Difficulty Very 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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

Steps after step 2 run on after germination.

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

3% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Draba p. 135Public domain
Show the original text
Draba (Brassicaceae). Most Draba are D-70 germinators. A comparison of the high germination of DS to low germination of fresh seed was given in Table 5-1. Sowing of fresh seed at 70 not only gives low germination, but is often fatal. D. densifolia germ. 70(99% in 5-11 d) and 40(100% in less than 3 w) with seed DS 6 m at 70. Germination in fresh seed is lower as shown by 40(53%)-70-40(2%) and 70-40(3%)-70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Draba p. 135. 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.