Deno’s Garden

Campanula persicifolia

Genus Campanula

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around September 24, 2026 for a May 3 last frost.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C

about 6 months from start to sowing. Then 13 days to germinate.

71% germination in 9–13 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Campanula p. 110Public domain
Show the original text
Campanula (Campanulaceae). Most species are D-70 germinators. There are some that are 40-70 germinators and photorequirers and C. persicifolia is a 0-70 germinator and germ. 70(71% in 9-13 d) for seed DS 6 m at 70 compared to 70-40(2%)-70(31%) for fresh seed. Germination was more extended for seed sown at 40 as shown by 40(11%)-70(4%) for DS seed and 40(1%)- 70-40(51%)-70(9%) for fresh seed. Seed 05 6 m at 40 was intermediate in behavior.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Campanula p. 110. 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 June 19, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 18, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    1 germinated in this phase.

  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

    9 germinated in this phase.

Steps after step 3 run on after germination.

about 9 months from start to sowing. Germination time not stated; 21 days assumed.

51% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Campanula p. 110Public domain
Show the original text
Campanula (Campanulaceae). Most species are D-70 germinators. There are some that are 40-70 germinators and photorequirers and C. persicifolia is a 0-70 germinator and germ. 70(71% in 9-13 d) for seed DS 6 m at 70 compared to 70-40(2%)-70(31%) for fresh seed. Germination was more extended for seed sown at 40 as shown by 40(11%)-70(4%) for DS seed and 40(1%)- 70-40(51%)-70(9%) for fresh seed. Seed 05 6 m at 40 was intermediate in behavior.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Campanula p. 110. 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 June 19, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 18, 2026.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    2 germinated in this phase.

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 9 months from start to sowing. Germination time not stated; 21 days assumed.

31% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Campanula p. 110Public domain
Show the original text
Campanula (Campanulaceae). Most species are D-70 germinators. There are some that are 40-70 germinators and photorequirers and C. persicifolia is a 0-70 germinator and germ. 70(71% in 9-13 d) for seed DS 6 m at 70 compared to 70-40(2%)-70(31%) for fresh seed. Germination was more extended for seed sown at 40 as shown by 40(11%)-70(4%) for DS seed and 40(1%)- 70-40(51%)-70(9%) for fresh seed. Seed 05 6 m at 40 was intermediate in behavior.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Campanula p. 110. 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 June 19, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 18, 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

    4 germinated in this phase.

Steps after step 2 run on after germination.

about 9 months from start to sowing. Germination time not stated; 21 days assumed.

11% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Campanula p. 110Public domain
Show the original text
Campanula (Campanulaceae). Most species are D-70 germinators. There are some that are 40-70 germinators and photorequirers and C. persicifolia is a 0-70 germinator and germ. 70(71% in 9-13 d) for seed DS 6 m at 70 compared to 70-40(2%)-70(31%) for fresh seed. Germination was more extended for seed sown at 40 as shown by 40(11%)-70(4%) for DS seed and 40(1%)- 70-40(51%)-70(9%) for fresh seed. Seed 05 6 m at 40 was intermediate in behavior.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Campanula p. 110. 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.