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Campanula persicifolia

Narrow-leaved Bellflower · Peach-leaved Bellflower · Peachleaf Bellflower

Family CampanulaceaeGenus Campanula

Several wide-open violet-blue bowl flowers facing sideways on one stem, in grass
FlowerWilson44691CC0

About the plant

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

The plant

Habit
Herbaceous PerennialExtension Gardener Plant Toolbox
Habit
perennial or subshrubPlants of the World Online
Height
1.5-3 ft45-90 cmExtension Gardener Plant Toolbox
Spread
1-1.5 ft30-45 cmExtension Gardener Plant Toolbox
Flower
Blue, Purple/Lavender, WhiteExtension Gardener Plant Toolbox
Blooms
SummerExtension Gardener Plant Toolbox
Native range
Albania, Austria, Baltic States, Belarus, Belgium, Bulgaria and elsewhereGBIF Backbone Taxonomy
Hardiness zones
3-7Extension Gardener Plant Toolbox

Growing conditions

Sun
Full sun; Partial ShadeExtension Gardener Plant Toolbox
Soil
High Organic Matter, Loam (Silt), SandExtension Gardener Plant Toolbox
Soil pH
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

  • The peach-leaved bellflower, with its cup-shaped lilac-blue or white flowers on stems up to 1 m, is widely considered an English cottage garden classic. Wikipedia: Campanula persicifolia

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 25, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 24, 2026.

  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 September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 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 6 months from start to step 3. Germination happens during step 3; 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 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

    2 germinated in this phase.

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 6 months from start to step 3. Germination happens during step 3; 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 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 days

  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 6 months from start to step 2. Germination happens during step 2; 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.

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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