Deno’s Garden

Callistemon speciosus

Genus Callistemon

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 March 15, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

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

100% germination in 21 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Callistemon p. 109Public domain
Show the original text
Callistemon (Myrtaceae). Seeds are small and difficult to count. C. sp. New Zealand germ. 70D(37% in 1-4 w), 70L(78% in 4-15 d), and 70D with GA-3(72% in 8-17 d). These apparent differences in percent germination may not be significant. It also germ. 70% in October from seed placed outdoors in late Sept. C. speciosus germ. 70D(50% in 1-4 w), 70L(78% in 4-15 d),70D GA-3(37% in 8- 12 d), 40(100% in 3rd w), and 100% in October from seeds placed outdoors in Sept.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Callistemon p. 109. 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 Low Rated by us, not by the source.

Sow around September 2027 — a date the source gives, not one counted back from a May 3 last frost. Too late for spring 2027 — that needed starting on September 2026.

  1. Sow outdoors and leave it

    Sown outdoors in September; up in October.

No stated waiting before sowing. Then 30 days to germinate.

100% germination in 30 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Callistemon p. 109Public domain
Show the original text
Callistemon (Myrtaceae). Seeds are small and difficult to count. C. sp. New Zealand germ. 70D(37% in 1-4 w), 70L(78% in 4-15 d), and 70D with GA-3(72% in 8-17 d). These apparent differences in percent germination may not be significant. It also germ. 70% in October from seed placed outdoors in late Sept. C. speciosus germ. 70D(50% in 1-4 w), 70L(78% in 4-15 d),70D GA-3(37% in 8- 12 d), 40(100% in 3rd w), and 100% in October from seeds placed outdoors in Sept.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Callistemon p. 109. 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 March 21, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 15 days to germinate.

78% germination in 4–15 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Callistemon p. 109Public domain
Show the original text
Callistemon (Myrtaceae). Seeds are small and difficult to count. C. sp. New Zealand germ. 70D(37% in 1-4 w), 70L(78% in 4-15 d), and 70D with GA-3(72% in 8-17 d). These apparent differences in percent germination may not be significant. It also germ. 70% in October from seed placed outdoors in late Sept. C. speciosus germ. 70D(50% in 1-4 w), 70L(78% in 4-15 d),70D GA-3(37% in 8- 12 d), 40(100% in 3rd w), and 100% in October from seeds placed outdoors in Sept.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Callistemon p. 109. 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 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.

50% germination in 7–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Callistemon p. 109Public domain
Show the original text
Callistemon (Myrtaceae). Seeds are small and difficult to count. C. sp. New Zealand germ. 70D(37% in 1-4 w), 70L(78% in 4-15 d), and 70D with GA-3(72% in 8-17 d). These apparent differences in percent germination may not be significant. It also germ. 70% in October from seed placed outdoors in late Sept. C. speciosus germ. 70D(50% in 1-4 w), 70L(78% in 4-15 d),70D GA-3(37% in 8- 12 d), 40(100% in 3rd w), and 100% in October from seeds placed outdoors in Sept.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Callistemon p. 109. 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 Moderate Rated by us, not by the source.

Start around March 24, 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 12 days to germinate.

37% germination in 8–12 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Callistemon p. 109Public domain
Show the original text
Callistemon (Myrtaceae). Seeds are small and difficult to count. C. sp. New Zealand germ. 70D(37% in 1-4 w), 70L(78% in 4-15 d), and 70D with GA-3(72% in 8-17 d). These apparent differences in percent germination may not be significant. It also germ. 70% in October from seed placed outdoors in late Sept. C. speciosus germ. 70D(50% in 1-4 w), 70L(78% in 4-15 d),70D GA-3(37% in 8- 12 d), 40(100% in 3rd w), and 100% in October from seeds placed outdoors in Sept.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Callistemon p. 109. 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.