Deno’s Garden

Amelanchier laevis

Genus Amelanchier

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around January 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on January 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

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 12 months from start to sowing. Then 84 days to germinate.

100% germination in 70–84 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Amelanchier p. 19Public domain
Show the original text
Amelanchier (Rosaceae). All seeds were WC 7 d, all experiments were conducted in the dark, and neither GA-3 or OT initiated germination. A. laevis germ. 70-40-70-40(100% in 10-12 w). Seeds started at 40 or 70 GA-3 largely rotted and did not germinate. Seeds DS 6 m were 97% dead and seeds DS 1 v were all dead. 1 A sanguinea germ. 40-70(3%)-40-70(56% in 2-30 d)-40-70 and 70-40-70-40- 70(3%)-40-70(26% in 1-7 w)-40(37%)-70(24% in 2-6 d).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Amelanchier p. 19. 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 March 12, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 11, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    3 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

Steps after step 4 run on after germination.

about 12 months from start to sowing. Then 30 days to germinate.

56% germination in 2–30 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Amelanchier p. 19Public domain
Show the original text
Amelanchier (Rosaceae). All seeds were WC 7 d, all experiments were conducted in the dark, and neither GA-3 or OT initiated germination. A. laevis germ. 70-40-70-40(100% in 10-12 w). Seeds started at 40 or 70 GA-3 largely rotted and did not germinate. Seeds DS 6 m were 97% dead and seeds DS 1 v were all dead. 1 A sanguinea germ. 40-70(3%)-40-70(56% in 2-30 d)-40-70 and 70-40-70-40- 70(3%)-40-70(26% in 1-7 w)-40(37%)-70(24% in 2-6 d).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Amelanchier p. 19. 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 March 26, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 25, 2025.

  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

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    3 germinated in this phase.

  6. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  7. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    26 germinated in this phase.

  8. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  9. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    24 germinated in this phase.

Steps after step 8 run on after germination.

about 2 years from start to sowing. Germination time not stated; 21 days assumed.

37% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Amelanchier p. 19Public domain
Show the original text
Amelanchier (Rosaceae). All seeds were WC 7 d, all experiments were conducted in the dark, and neither GA-3 or OT initiated germination. A. laevis germ. 70-40-70-40(100% in 10-12 w). Seeds started at 40 or 70 GA-3 largely rotted and did not germinate. Seeds DS 6 m were 97% dead and seeds DS 1 v were all dead. 1 A sanguinea germ. 40-70(3%)-40-70(56% in 2-30 d)-40-70 and 70-40-70-40- 70(3%)-40-70(26% in 1-7 w)-40(37%)-70(24% in 2-6 d).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Amelanchier p. 19. 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.