Deno’s Garden

Dracocephalum tanguticum

Genus Dracocephalum

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around December 14, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 13, 2025.

  1. Gibberellic acid soak

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    1/5 germinated in this phase.

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 15 months from start to sowing. Then 28 days to germinate.

60% germination in 28 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Dracocephalum p. 39Public domain
Show the original text
Dracocephalum (Lamiaceae). D. tanguticum germ. 70 GA-3(1/5 in 9th w)- 40-70-40-70(3/5 in 4th w), 70L-40(2/5)-70(1/5)-40, 70D-40-70D(1/6)-40(1/6), and none in 40-70D-40-70D-40. No clear pattern emerges from these results except that germination is extended.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Dracocephalum p. 39. 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. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    1/5 germinated in this phase.

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

Steps after step 2 run on after germination.

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

40% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Dracocephalum p. 39Public domain
Show the original text
Dracocephalum (Lamiaceae). D. tanguticum germ. 70 GA-3(1/5 in 9th w)- 40-70-40-70(3/5 in 4th w), 70L-40(2/5)-70(1/5)-40, 70D-40-70D(1/6)-40(1/6), and none in 40-70D-40-70D-40. No clear pattern emerges from these results except that germination is extended.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Dracocephalum p. 39. 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 June 19, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 18, 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

  3. Warm moist stratification

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

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    1/6 germinated in this phase.

Steps after step 3 run on after germination.

about 9 months from start to sowing. Germination time not stated; 21 days assumed.

17% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Dracocephalum p. 39Public domain
Show the original text
Dracocephalum (Lamiaceae). D. tanguticum germ. 70 GA-3(1/5 in 9th w)- 40-70-40-70(3/5 in 4th w), 70L-40(2/5)-70(1/5)-40, 70D-40-70D(1/6)-40(1/6), and none in 40-70D-40-70D-40. No clear pattern emerges from these results except that germination is extended.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Dracocephalum p. 39. 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

  1. Cold moist stratification

    Temperature: 40°F 4°C

No stated waiting before sowing.

0% germination.

Nothing germinated at 40.

This source doesn't state how long.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Dracocephalum p. 39Public domain
Show the original text
Dracocephalum (Lamiaceae). D. tanguticum germ. 70 GA-3(1/5 in 9th w)- 40-70-40-70(3/5 in 4th w), 70L-40(2/5)-70(1/5)-40, 70D-40-70D(1/6)-40(1/6), and none in 40-70D-40-70D-40. No clear pattern emerges from these results except that germination is extended.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Dracocephalum p. 39. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.