Deno’s Garden

Arctostaphylos crustacea

Genus Arctostaphylos

Two sources report 5 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Very 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. 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

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 12 months from start to sowing. Germination time not stated; 21 days assumed.

2% germination.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Arctostaphylos p. 14Public domain
Show the original text
Arctostaphylos (Ericaceae). 1 - A. crustacea. data is now more complete. It germ. 70(GA-3)-40(2%)-70D(2%)- 40-70D(2%) and 70D-40-70D-40(2%). Séeds DS 2 y germ. 70(GA-3)-40-70D(6% in 2- 10 w).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Arctostaphylos p. 14. 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, 1998

Difficulty Very 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. 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 Light: dark

    2 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 Light: dark

    2 germinated in this phase.

Steps after step 2 run on after germination.

about 6 months from start to sowing. Germination time not stated; 21 days assumed.

2% germination.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Arctostaphylos p. 14Public domain
Show the original text
Arctostaphylos (Ericaceae). 1 - A. crustacea. data is now more complete. It germ. 70(GA-3)-40(2%)-70D(2%)- 40-70D(2%) and 70D-40-70D-40(2%). Séeds DS 2 y germ. 70(GA-3)-40-70D(6% in 2- 10 w).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Arctostaphylos p. 14. 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, 1998

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

Start around May 1, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on April 30, 2024.

  1. Dry storage

    Duration: 730 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 Light: dark

about 2.5 years from start to sowing. Then 70 days to germinate.

6% germination in 14–70 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Arctostaphylos p. 14Public domain
Show the original text
Arctostaphylos (Ericaceae). 1 - A. crustacea. data is now more complete. It germ. 70(GA-3)-40(2%)-70D(2%)- 40-70D(2%) and 70D-40-70D-40(2%). Séeds DS 2 y germ. 70(GA-3)-40-70D(6% in 2- 10 w).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Arctostaphylos p. 14. 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 September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 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

    2 germinated in this phase.

Steps after step 2 run on after germination.

about 6 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, Arctostaphylos p. 21Public domain
Show the original text
Arctostaphylos (Ericaceae). Studies on A. crustacea germ. 70(GA-3)-40(2%)-70(2%) and 70-40-70-40(2%). None germ. in 70L, 40-70-40-70, or OT.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Arctostaphylos p. 21. 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 Very 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. 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. Germination time not stated; 21 days assumed.

2% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Arctostaphylos p. 21Public domain
Show the original text
Arctostaphylos (Ericaceae). Studies on A. crustacea germ. 70(GA-3)-40(2%)-70(2%) and 70-40-70-40(2%). None germ. in 70L, 40-70-40-70, or OT.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Arctostaphylos p. 21. 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.