Deno’s Garden

Papaver somniferum

Genus Papaver

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around July 30, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 29, 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 70 days to germinate.

62% germination in 14–70 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Papaver p. 185Public domain
Show the original text
Papaver (Papaveraceae). The DS seed of the following species germ. immediately at 70: P. somniferum is a dramatic 0-70 germinator. Seeds DS 6 m at 70 germ. 70L(60%), 70D GA-3(60%), and 70D(30%) all on the 4th d. Fresh seeds germ. 70D GA-3)-40(62% in 2-10 w) and none in any other treatment.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Papaver p. 185. 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 Moderate 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. Sow and cover

    Temperature: 70°F 21°C Light: light

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

60% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Papaver p. 185Public domain
Show the original text
Papaver (Papaveraceae). The DS seed of the following species germ. immediately at 70: P. somniferum is a dramatic 0-70 germinator. Seeds DS 6 m at 70 germ. 70L(60%), 70D GA-3(60%), and 70D(30%) all on the 4th d. Fresh seeds germ. 70D GA-3)-40(62% in 2-10 w) and none in any other treatment.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Papaver p. 185. 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 Moderate 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. Gibberellic acid soak

  3. Sow and cover

    Temperature: 70°F 21°C Light: dark

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

60% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Papaver p. 185Public domain
Show the original text
Papaver (Papaveraceae). The DS seed of the following species germ. immediately at 70: P. somniferum is a dramatic 0-70 germinator. Seeds DS 6 m at 70 germ. 70L(60%), 70D GA-3(60%), and 70D(30%) all on the 4th d. Fresh seeds germ. 70D GA-3)-40(62% in 2-10 w) and none in any other treatment.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Papaver p. 185. 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 Moderate 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. Sow and cover

    Temperature: 70°F 21°C Light: dark

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

30% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Papaver p. 185Public domain
Show the original text
Papaver (Papaveraceae). The DS seed of the following species germ. immediately at 70: P. somniferum is a dramatic 0-70 germinator. Seeds DS 6 m at 70 germ. 70L(60%), 70D GA-3(60%), and 70D(30%) all on the 4th d. Fresh seeds germ. 70D GA-3)-40(62% in 2-10 w) and none in any other treatment.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Papaver p. 185. 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.