Deno’s Garden

Cotoneaster microphyllus

Genus Cotoneaster

Two sources report 7 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around July 23, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 22, 2026.

  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

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    2 germinated in this phase.

Steps after step 2 run on after germination.

about 6 months from start to sowing. Then 77 days to germinate.

29% germination in 14–77 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cotoneaster p. 34Public domain
Show the original text
Cotoneaster (Rosaceae). C. microphyllus v. cochleatus experiments are now complete, and it is found that there are altematives to GA-3. The seèds germ. 70 GA-3(40% in 4-10 w)-40- 70(3%), 70D(2%)-40-70D, and 40-70(29% in 2-11 w)-40-70(2%). Seeds DS 2 y germ. 40-70(46% in 1-9 w) and 70 GA-3(40% in 4-10 w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cotoneaster p. 34. 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 Moderate Rated by us, not by the source.

Start around August 6, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 5, 2024.

  1. Dry storage

    Duration: 730 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

about 2.5 years from start to sowing. Then 63 days to germinate.

46% germination in 7–63 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cotoneaster p. 34Public domain
Show the original text
Cotoneaster (Rosaceae). C. microphyllus v. cochleatus experiments are now complete, and it is found that there are altematives to GA-3. The seèds germ. 70 GA-3(40% in 4-10 w)-40- 70(3%), 70D(2%)-40-70D, and 40-70(29% in 2-11 w)-40-70(2%). Seeds DS 2 y germ. 40-70(46% in 1-9 w) and 70 GA-3(40% in 4-10 w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cotoneaster p. 34. 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 October 27, 2026 for a May 3 last frost.

  1. Gibberellic acid soak

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    3 germinated in this phase.

Steps after step 2 run on after germination.

about 3 months from start to sowing. Then 70 days to germinate.

40% germination in 28–70 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cotoneaster p. 34Public domain
Show the original text
Cotoneaster (Rosaceae). C. microphyllus v. cochleatus experiments are now complete, and it is found that there are altematives to GA-3. The seèds germ. 70 GA-3(40% in 4-10 w)-40- 70(3%), 70D(2%)-40-70D, and 40-70(29% in 2-11 w)-40-70(2%). Seeds DS 2 y germ. 40-70(46% in 1-9 w) and 70 GA-3(40% in 4-10 w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cotoneaster p. 34. 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

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: 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

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, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cotoneaster p. 34Public domain
Show the original text
Cotoneaster (Rosaceae). C. microphyllus v. cochleatus experiments are now complete, and it is found that there are altematives to GA-3. The seèds germ. 70 GA-3(40% in 4-10 w)-40- 70(3%), 70D(2%)-40-70D, and 40-70(29% in 2-11 w)-40-70(2%). Seeds DS 2 y germ. 40-70(46% in 1-9 w) and 70 GA-3(40% in 4-10 w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cotoneaster p. 34. 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 5

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around January 26, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on January 25, 2025.

  1. Dry storage

    Duration: 730 daysTemperature: 70°F 21°C

  2. Gibberellic acid soak

  3. Sow and cover

    Temperature: 70°F 21°C

about 2 years from start to sowing. Then 70 days to germinate.

40% germination in 28–70 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cotoneaster p. 34Public domain
Show the original text
Cotoneaster (Rosaceae). C. microphyllus v. cochleatus experiments are now complete, and it is found that there are altematives to GA-3. The seèds germ. 70 GA-3(40% in 4-10 w)-40- 70(3%), 70D(2%)-40-70D, and 40-70(29% in 2-11 w)-40-70(2%). Seeds DS 2 y germ. 40-70(46% in 1-9 w) and 70 GA-3(40% in 4-10 w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cotoneaster p. 34. 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 6

DerivedN. C. Deno, 1993

Difficulty Very high Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Germination time not stated; 21 days assumed.

2% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cotoneaster p. 126Public domain
Show the original text
Cotoneaster (Rosaceae). C. microphyllus v. cochleatus germ. 70D GA-3(40% in 4-10 w), 70D(2%), and 40(none).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cotoneaster p. 126. 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 7

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around January 25, 2027 for a May 3 last frost.

  1. Gibberellic acid soak

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 70 days to germinate.

40% germination in 28–70 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cotoneaster p. 126Public domain
Show the original text
Cotoneaster (Rosaceae). C. microphyllus v. cochleatus germ. 70D GA-3(40% in 4-10 w), 70D(2%), and 40(none).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cotoneaster p. 126. 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.