Deno’s Garden

Physoplexis comosa

Genus Physoplexis

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 15, 2027 for a May 3 last frost.

  1. Gibberellic acid soak

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 21 days to germinate.

82% germination in 21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Physoplexis p. 193Public domain
Show the original text
Physoplexis (Campanulaceae). P. comosum germination was dramatically stimulated by GA-3, and the seedlings were normal and healthy. Seeds germ. 70D GA-3(82% in 3rd w), 70D(9% in 2-6 w), 70L(none), 40-70(none), and none in outdoor treatment. A prior 4 w in 70D or 70L had no effect, but a prior 3 m at 40 slowed down the rate and reduced the percent germination.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Physoplexis p. 193. 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 Very high Rated by us, not by the source.

Start around February 22, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 42 days to germinate.

9% germination in 14–42 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Physoplexis p. 193Public domain
Show the original text
Physoplexis (Campanulaceae). P. comosum germination was dramatically stimulated by GA-3, and the seedlings were normal and healthy. Seeds germ. 70D GA-3(82% in 3rd w), 70D(9% in 2-6 w), 70L(none), 40-70(none), and none in outdoor treatment. A prior 4 w in 70D or 70L had no effect, but a prior 3 m at 40 slowed down the rate and reduced the percent germination.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Physoplexis p. 193. 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 Very high Rated by us, not by the source.

  1. Sow outdoors and leave it

    Nothing germinated outdoors.

No stated waiting before sowing.

0% germination.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Physoplexis p. 193Public domain
Show the original text
Physoplexis (Campanulaceae). P. comosum germination was dramatically stimulated by GA-3, and the seedlings were normal and healthy. Seeds germ. 70D GA-3(82% in 3rd w), 70D(9% in 2-6 w), 70L(none), 40-70(none), and none in outdoor treatment. A prior 4 w in 70D or 70L had no effect, but a prior 3 m at 40 slowed down the rate and reduced the percent germination.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Physoplexis p. 193. 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.