Deno’s Garden

Campanula punctata

Genus Campanula

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around March 26, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 10 days to germinate.

78% germination in 10 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Campanula p. 110Public domain
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Campanula (Campanulaceae). Most species are D-70 germinators. There are some that are 40-70 germinators and photorequirers and C. punctata and exhibited a similar disappearance of the photorequirement on DS. Fresh seed germ. 70L(78% in 6 :10 d) and none in 70D, 40-70D, or 40-70L. This failure to germinate in 40-70L shows that an initial 3 m at 40 is fatal. Seed DS 6 m at. 70 germ. 100% in 6-8 d in either 70L or 70D and 40(11% in 3-5 w).
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 March 1, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

No stated waiting before sowing. Then 35 days to germinate.

11% germination in 21–35 days.

This source doesn't state how long.

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. punctata and exhibited a similar disappearance of the photorequirement on DS. Fresh seed germ. 70L(78% in 6 :10 d) and none in 70D, 40-70D, or 40-70L. This failure to germinate in 40-70L shows that an initial 3 m at 40 is fatal. Seed DS 6 m at. 70 germ. 100% in 6-8 d in either 70L or 70D and 40(11% in 3-5 w).
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

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

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. punctata and exhibited a similar disappearance of the photorequirement on DS. Fresh seed germ. 70L(78% in 6 :10 d) and none in 70D, 40-70D, or 40-70L. This failure to germinate in 40-70L shows that an initial 3 m at 40 is fatal. Seed DS 6 m at. 70 germ. 100% in 6-8 d in either 70L or 70D and 40(11% in 3-5 w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Campanula p. 110. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.