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Cotoneaster dammeri

Bearberry Cotoneaster

Family RosaceaeGenus Cotoneaster

Small white five-petalled flowers with dark red anthers on a trailing stem of glossy oval leaves
FlowerPère IgorCC BY-SA 3.0

About the plant

What it is and where it grows — not part of any germination protocol.

The plant

Habit
Ground Cover, ShrubExtension Gardener Plant Toolbox
Habit
subshrub or shrubPlants of the World Online
Height
1 ft30 cmExtension Gardener Plant Toolbox
Spread
4-6 ft1.2-1.8 mExtension Gardener Plant Toolbox
Flower
WhiteExtension Gardener Plant Toolbox
Blooms
Spring, SummerExtension Gardener Plant Toolbox
Native range
China North-Central, China South-CentralGBIF Backbone Taxonomy
Hardiness zones
5-8Extension Gardener Plant Toolbox

Growing conditions

Sun
Full sun; Partial ShadeExtension Gardener Plant Toolbox
Soil
Clay, Loam (Silt), SandExtension Gardener Plant Toolbox
Soil pH
Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0)Extension Gardener Plant Toolbox
Moisture
Good Drainage, MoistExtension Gardener Plant Toolbox

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Extension Gardener Plant Toolbox — NC State Extension; Plants of the World Online — Royal Botanic Gardens, Kew; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Worth knowing

  • Bearberry cotoneaster comes from central and southern China and has become naturalized in Europe. It is a common ornamental, with cultivars such as 'Skogholm' and 'Royal Beauty'. Wikipedia: Cotoneaster dammeri

This source reports 5 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

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

  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

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    4 germinated in this phase.

Steps after step 4 run on after germination.

about 12 months from start to step 4. Germination happens during step 4; time not stated, 21 days assumed.

43% 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. dammed germ. over a number of cycles usiñgeither fresh seed or DS seed. No dominant pattern emerged. Fresh seed germ. 40(20%)-70(3%)-40-70(20%) and none over five cycles starting at 70. Seed DS 6 m at 70 germ. 70(10%)-40-70(20%) and 40(40%)-70(5%)-40-70. Seed DS 6 m at 40 germ. 70-40-70(43%)-40-70(4%) and 40(4%)-70-40(17%)-70-40-70(8%).
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 2

DerivedN. C. Deno, 1993

Difficulty High 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. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    5 germinated in this phase.

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

Steps after step 2 run on after germination.

about 6 months from start to step 2. Germination happens during step 2; time not stated, 21 days assumed.

40% 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. dammed germ. over a number of cycles usiñgeither fresh seed or DS seed. No dominant pattern emerged. Fresh seed germ. 40(20%)-70(3%)-40-70(20%) and none over five cycles starting at 70. Seed DS 6 m at 70 germ. 70(10%)-40-70(20%) and 40(40%)-70(5%)-40-70. Seed DS 6 m at 40 germ. 70-40-70(43%)-40-70(4%) and 40(4%)-70-40(17%)-70-40-70(8%).
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 3

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

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

  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

    20 germinated in this phase.

Steps after step 1 run on after germination.

Germination happens during step 1; time not stated, 21 days assumed.

20% 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. dammed germ. over a number of cycles usiñgeither fresh seed or DS seed. No dominant pattern emerged. Fresh seed germ. 40(20%)-70(3%)-40-70(20%) and none over five cycles starting at 70. Seed DS 6 m at 70 germ. 70(10%)-40-70(20%) and 40(40%)-70(5%)-40-70. Seed DS 6 m at 40 germ. 70-40-70(43%)-40-70(4%) and 40(4%)-70-40(17%)-70-40-70(8%).
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 4

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

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

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

    10 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

about 12 months from start to step 4. Germination happens during step 4; time not stated, 21 days assumed.

20% 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. dammed germ. over a number of cycles usiñgeither fresh seed or DS seed. No dominant pattern emerged. Fresh seed germ. 40(20%)-70(3%)-40-70(20%) and none over five cycles starting at 70. Seed DS 6 m at 70 germ. 70(10%)-40-70(20%) and 40(40%)-70(5%)-40-70. Seed DS 6 m at 40 germ. 70-40-70(43%)-40-70(4%) and 40(4%)-70-40(17%)-70-40-70(8%).
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 5

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

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

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    4 germinated in this phase.

  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

    8 germinated in this phase.

Steps after step 4 run on after germination.

about 12 months from start to step 4. Germination happens during step 4; time not stated, 21 days assumed.

17% 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. dammed germ. over a number of cycles usiñgeither fresh seed or DS seed. No dominant pattern emerged. Fresh seed germ. 40(20%)-70(3%)-40-70(20%) and none over five cycles starting at 70. Seed DS 6 m at 70 germ. 70(10%)-40-70(20%) and 40(40%)-70(5%)-40-70. Seed DS 6 m at 40 germ. 70-40-70(43%)-40-70(4%) and 40(4%)-70-40(17%)-70-40-70(8%).
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.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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