Deno’s Garden

Hypericum perforatum

Genus Hypericum

This source reports 5 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around September 10, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 9, 2026.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Gibberellic acid soak

  3. Sow and cover

    Temperature: 70°F 21°C Light: dark

about 6 months from start to sowing. Then 28 days to germinate.

100% germination in 7–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hypericum p. 154Public domain
Show the original text
Hypericum (Hyperiaceae). H. perforatum, it is possible that germination would have been higher in light. H. perforatum germ. 70L(90-100% in 1-4 w), 70D GA-3(100% in 1-4 w), 70D(20- 40% in 1-4 w), and 40-70L(10-35%) using seed DS 6 m at 70. Fresh seed germ. 70D- 40-70L(100%) and 70D-40-70D(none). The photorequirement dies away with DS.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hypericum p. 154. 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 Moderate 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 Light: dark

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

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

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

100% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hypericum p. 154Public domain
Show the original text
Hypericum (Hyperiaceae). H. perforatum, it is possible that germination would have been higher in light. H. perforatum germ. 70L(90-100% in 1-4 w), 70D GA-3(100% in 1-4 w), 70D(20- 40% in 1-4 w), and 40-70L(10-35%) using seed DS 6 m at 70. Fresh seed germ. 70D- 40-70L(100%) and 70D-40-70D(none). The photorequirement dies away with DS.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hypericum p. 154. 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 Low Rated by us, not by the source.

Start around September 10, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 9, 2026.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: light

about 6 months from start to sowing. Then 28 days to germinate.

90% germination in 7–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hypericum p. 154Public domain
Show the original text
Hypericum (Hyperiaceae). H. perforatum, it is possible that germination would have been higher in light. H. perforatum germ. 70L(90-100% in 1-4 w), 70D GA-3(100% in 1-4 w), 70D(20- 40% in 1-4 w), and 40-70L(10-35%) using seed DS 6 m at 70. Fresh seed germ. 70D- 40-70L(100%) and 70D-40-70D(none). The photorequirement dies away with DS.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hypericum p. 154. 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 10, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 9, 2026.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

about 6 months from start to sowing. Then 28 days to germinate.

20% germination in 7–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hypericum p. 154Public domain
Show the original text
Hypericum (Hyperiaceae). H. perforatum, it is possible that germination would have been higher in light. H. perforatum germ. 70L(90-100% in 1-4 w), 70D GA-3(100% in 1-4 w), 70D(20- 40% in 1-4 w), and 40-70L(10-35%) using seed DS 6 m at 70. Fresh seed germ. 70D- 40-70L(100%) and 70D-40-70D(none). The photorequirement dies away with DS.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hypericum p. 154. 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 5

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around March 21, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 20, 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 Light: light

about 12 months from start to sowing. Germination time not stated; 21 days assumed.

10% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Hypericum p. 154Public domain
Show the original text
Hypericum (Hyperiaceae). H. perforatum, it is possible that germination would have been higher in light. H. perforatum germ. 70L(90-100% in 1-4 w), 70D GA-3(100% in 1-4 w), 70D(20- 40% in 1-4 w), and 40-70L(10-35%) using seed DS 6 m at 70. Fresh seed germ. 70D- 40-70L(100%) and 70D-40-70D(none). The photorequirement dies away with DS.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Hypericum p. 154. 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.