Deno’s Garden

Primula pamirica

Genus Primula

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 10, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 9, 2026.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: either

about 6 months from start to sowing. Then 28 days to germinate.

90% germination in 7–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Primula p. 197Public domain
Show the original text
Primula. (Primulaceae). The discovery of a photorequirement in P. pamirica (F) germ. best with seed DS 6 m at 70 in 70(90% in 1-4 w). Fresh seed germ 70-40-70(80% in 1-5 d) indicating that DS is beneficial although unfortunately the data were not taken on the same set of seeds. Light had no effect. P; parryi (P) germ. best in a 40-70 pattern as shown by 40-70(32% in 4 d-6 w) and 70(2%)-40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Primula p. 197. 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 July 5, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 4, 2026.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

  3. Warm moist stratification

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

about 9 months from start to sowing. Then 5 days to germinate.

80% germination in 1–5 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Primula p. 197Public domain
Show the original text
Primula. (Primulaceae). The discovery of a photorequirement in P. pamirica (F) germ. best with seed DS 6 m at 70 in 70(90% in 1-4 w). Fresh seed germ 70-40-70(80% in 1-5 d) indicating that DS is beneficial although unfortunately the data were not taken on the same set of seeds. Light had no effect. P; parryi (P) germ. best in a 40-70 pattern as shown by 40-70(32% in 4 d-6 w) and 70(2%)-40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Primula p. 197. 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 August 27, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 26, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

  2. Warm moist stratification

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

about 6 months from start to sowing. Then 42 days to germinate.

32% germination in 4–42 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Primula p. 197Public domain
Show the original text
Primula. (Primulaceae). The discovery of a photorequirement in P. pamirica (F) germ. best with seed DS 6 m at 70 in 70(90% in 1-4 w). Fresh seed germ 70-40-70(80% in 1-5 d) indicating that DS is beneficial although unfortunately the data were not taken on the same set of seeds. Light had no effect. P; parryi (P) germ. best in a 40-70 pattern as shown by 40-70(32% in 4 d-6 w) and 70(2%)-40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Primula p. 197. 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 December 15, 2026 for a May 3 last frost.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

Steps after step 1 run on after germination.

about 3 months from start to sowing. Germination time not stated; 21 days assumed.

2% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Primula p. 197Public domain
Show the original text
Primula. (Primulaceae). The discovery of a photorequirement in P. pamirica (F) germ. best with seed DS 6 m at 70 in 70(90% in 1-4 w). Fresh seed germ 70-40-70(80% in 1-5 d) indicating that DS is beneficial although unfortunately the data were not taken on the same set of seeds. Light had no effect. P; parryi (P) germ. best in a 40-70 pattern as shown by 40-70(32% in 4 d-6 w) and 70(2%)-40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Primula p. 197. 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.