Deno’s Garden

Crataegus monogyna

Genus Crataegus

Two sources report 10 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around September 29, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 28, 2025.

  1. Clean the flesh off the seed

  2. Leach in running water

    Duration: 7 days

    Washed and cleaned daily for 7 days.

  3. Dry storage

    Duration: 180 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

  6. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  7. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  8. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  9. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    20 germinated in this phase.

Steps after step 7 run on after germination.

about 1.5 years from start to sowing. Then 7 days to germinate.

70% germination in 7 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Crataegus p. 34Public domain
Show the original text
Crataegus (Rosaceae). C. monogyna germination is extended overa number of cycles. Data is now complete. The seeds were WC for 7 d. Fresh seeds germ. 70-40-70(31% in 2nd w)-40-70(4%), 40-70(4%)-40-70-40-70(56% in 1st w), and 15% in March and April from seed set outdoors the previous October. Seeds DS 6 m at 70 germ. 70-40-70(17% in 2nd w) and 40-70-40-70(70% in 1st w)-40-70(20% in 5th d). It is evident that longer and shorter cycle times and DS times should be investigated, particularly since fresh and DS seed did not give identical behaviors.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Crataegus 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 High Rated by us, not by the source.

Start around September 29, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 28, 2025.

  1. Clean the flesh off the seed

  2. Leach in running water

    Duration: 7 days

    Washed and cleaned daily for 7 days.

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    4 germinated in this phase.

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  7. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  8. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 1.5 years from start to sowing. Then 7 days to germinate.

56% germination in 7 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Crataegus p. 34Public domain
Show the original text
Crataegus (Rosaceae). C. monogyna germination is extended overa number of cycles. Data is now complete. The seeds were WC for 7 d. Fresh seeds germ. 70-40-70(31% in 2nd w)-40-70(4%), 40-70(4%)-40-70-40-70(56% in 1st w), and 15% in March and April from seed set outdoors the previous October. Seeds DS 6 m at 70 germ. 70-40-70(17% in 2nd w) and 40-70-40-70(70% in 1st w)-40-70(20% in 5th d). It is evident that longer and shorter cycle times and DS times should be investigated, particularly since fresh and DS seed did not give identical behaviors.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Crataegus 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.

Sow around October 2026 — a date the source gives, not one counted back from a May 3 last frost.

  1. Clean the flesh off the seed

  2. Leach in running water

    Duration: 7 days

    Washed and cleaned daily for 7 days.

  3. Sow outdoors and leave it

    Sown outdoors in October; up in March and April.

7 days from start to sowing. Then 150 days to germinate.

15% germination in 150 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Crataegus p. 34Public domain
Show the original text
Crataegus (Rosaceae). C. monogyna germination is extended overa number of cycles. Data is now complete. The seeds were WC for 7 d. Fresh seeds germ. 70-40-70(31% in 2nd w)-40-70(4%), 40-70(4%)-40-70-40-70(56% in 1st w), and 15% in March and April from seed set outdoors the previous October. Seeds DS 6 m at 70 germ. 70-40-70(17% in 2nd w) and 40-70-40-70(70% in 1st w)-40-70(20% in 5th d). It is evident that longer and shorter cycle times and DS times should be investigated, particularly since fresh and DS seed did not give identical behaviors.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Crataegus 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 High Rated by us, not by the source.

Start around December 21, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 20, 2025.

  1. Clean the flesh off the seed

  2. Leach in running water

    Duration: 7 days

    Washed and cleaned daily for 7 days.

  3. Dry storage

    Duration: 180 daysTemperature: 70°F 21°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 14 days to germinate.

17% germination in 14 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Crataegus p. 34Public domain
Show the original text
Crataegus (Rosaceae). C. monogyna germination is extended overa number of cycles. Data is now complete. The seeds were WC for 7 d. Fresh seeds germ. 70-40-70(31% in 2nd w)-40-70(4%), 40-70(4%)-40-70-40-70(56% in 1st w), and 15% in March and April from seed set outdoors the previous October. Seeds DS 6 m at 70 germ. 70-40-70(17% in 2nd w) and 40-70-40-70(70% in 1st w)-40-70(20% in 5th d). It is evident that longer and shorter cycle times and DS times should be investigated, particularly since fresh and DS seed did not give identical behaviors.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Crataegus 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 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. Clean the flesh off the seed

  2. Leach in running water

    Duration: 7 days

    Washed and cleaned daily for 7 days.

  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

  6. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  7. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    4 germinated in this phase.

Steps after step 5 run on after germination.

about 9 months from start to sowing. Then 14 days to germinate.

31% germination in 14 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Crataegus p. 34Public domain
Show the original text
Crataegus (Rosaceae). C. monogyna germination is extended overa number of cycles. Data is now complete. The seeds were WC for 7 d. Fresh seeds germ. 70-40-70(31% in 2nd w)-40-70(4%), 40-70(4%)-40-70-40-70(56% in 1st w), and 15% in March and April from seed set outdoors the previous October. Seeds DS 6 m at 70 germ. 70-40-70(17% in 2nd w) and 40-70-40-70(70% in 1st w)-40-70(20% in 5th d). It is evident that longer and shorter cycle times and DS times should be investigated, particularly since fresh and DS seed did not give identical behaviors.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Crataegus 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 High Rated by us, not by the source.

Start around September 22, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 21, 2025.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    4 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 18 months from start to sowing. Germination time not stated; 21 days assumed.

55% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Crataegus p. 126Public domain
Show the original text
Crataegus (Rosaceae). C. monogyna germ. 70-40-70(31% in 5-17d)-40-70(4%), 40-70(4%)-40-70-40- 70(55% in lstw), and 15% in March and April in outdoor treatment from seed placed outdoors the previous October. Seeds DS 6 m at 70 gave similar multicycle germinations as shown by 70-40-70(17% in 2nd w) and 40-70-40-70(70% in 1st w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Crataegus 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 October 6, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on October 5, 2025.

  1. Dry storage

    Duration: 180 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

about 18 months from start to sowing. Then 7 days to germinate.

70% germination in 7 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Crataegus p. 126Public domain
Show the original text
Crataegus (Rosaceae). C. monogyna germ. 70-40-70(31% in 5-17d)-40-70(4%), 40-70(4%)-40-70-40- 70(55% in lstw), and 15% in March and April in outdoor treatment from seed placed outdoors the previous October. Seeds DS 6 m at 70 gave similar multicycle germinations as shown by 70-40-70(17% in 2nd w) and 40-70-40-70(70% in 1st w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Crataegus 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 8

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Sow around October 2026 — a date the source gives, not one counted back from a May 3 last frost.

  1. Sow outdoors and leave it

    Sown outdoors in October; up in March and April.

No stated waiting before sowing. Then 150 days to germinate.

15% germination in 150 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Crataegus p. 126Public domain
Show the original text
Crataegus (Rosaceae). C. monogyna germ. 70-40-70(31% in 5-17d)-40-70(4%), 40-70(4%)-40-70-40- 70(55% in lstw), and 15% in March and April in outdoor treatment from seed placed outdoors the previous October. Seeds DS 6 m at 70 gave similar multicycle germinations as shown by 70-40-70(17% in 2nd w) and 40-70-40-70(70% in 1st w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Crataegus 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 9

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

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

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    4 germinated in this phase.

Steps after step 3 run on after germination.

about 9 months from start to sowing. Then 17 days to germinate.

31% germination in 5–17 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Crataegus p. 126Public domain
Show the original text
Crataegus (Rosaceae). C. monogyna germ. 70-40-70(31% in 5-17d)-40-70(4%), 40-70(4%)-40-70-40- 70(55% in lstw), and 15% in March and April in outdoor treatment from seed placed outdoors the previous October. Seeds DS 6 m at 70 gave similar multicycle germinations as shown by 70-40-70(17% in 2nd w) and 40-70-40-70(70% in 1st w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Crataegus 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 10

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around December 28, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 27, 2025.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°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

about 15 months from start to sowing. Then 14 days to germinate.

17% germination in 14 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Crataegus p. 126Public domain
Show the original text
Crataegus (Rosaceae). C. monogyna germ. 70-40-70(31% in 5-17d)-40-70(4%), 40-70(4%)-40-70-40- 70(55% in lstw), and 15% in March and April in outdoor treatment from seed placed outdoors the previous October. Seeds DS 6 m at 70 gave similar multicycle germinations as shown by 70-40-70(17% in 2nd w) and 40-70-40-70(70% in 1st w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Crataegus 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.