Deno’s Garden

Calyptridium monospermum

Genus Calyptridium

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Low Rated by us, not by the source.

Start around March 8, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 28 days to germinate.

82% germination in 7–28 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Calyptridium p. 27Public domain
Show the original text
Calyptridium (Portulacaceae). C. monospermum has been added. C. monospermum germ. 70L(82% in 1-4 w), 70 GA-3(75% in 2nd w), 70D(31% in 1-4 w), and 40-70D(74% in 4-18 d). Outdoor treatment reduced germination to 12% probably because the -20 deg. was largeiy fatal.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Calyptridium p. 27. 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, 1996

Difficulty Low Rated by us, not by the source.

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

  1. Gibberellic acid soak

  2. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 14 days to germinate.

75% germination in 14 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Calyptridium p. 27Public domain
Show the original text
Calyptridium (Portulacaceae). C. monospermum has been added. C. monospermum germ. 70L(82% in 1-4 w), 70 GA-3(75% in 2nd w), 70D(31% in 1-4 w), and 40-70D(74% in 4-18 d). Outdoor treatment reduced germination to 12% probably because the -20 deg. was largeiy fatal.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Calyptridium p. 27. 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, 1996

Difficulty Moderate Rated by us, not by the source.

Start around September 20, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 19, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

about 6 months from start to sowing. Then 18 days to germinate.

74% germination in 4–18 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Calyptridium p. 27Public domain
Show the original text
Calyptridium (Portulacaceae). C. monospermum has been added. C. monospermum germ. 70L(82% in 1-4 w), 70 GA-3(75% in 2nd w), 70D(31% in 1-4 w), and 40-70D(74% in 4-18 d). Outdoor treatment reduced germination to 12% probably because the -20 deg. was largeiy fatal.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Calyptridium p. 27. 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 Moderate Rated by us, not by the source.

Start around March 8, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 28 days to germinate.

31% germination in 7–28 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Calyptridium p. 27Public domain
Show the original text
Calyptridium (Portulacaceae). C. monospermum has been added. C. monospermum germ. 70L(82% in 1-4 w), 70 GA-3(75% in 2nd w), 70D(31% in 1-4 w), and 40-70D(74% in 4-18 d). Outdoor treatment reduced germination to 12% probably because the -20 deg. was largeiy fatal.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Calyptridium p. 27. 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.