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Melaleuca quadrifida

One-sided Bottlebrush

Family MyrtaceaeGenus Melaleuca

A tight cluster of woody gray seed capsules on a thick twig, beside a scatter of fine brown seeds, with a one-centimeter scale.
SeedRoger CulosCC BY-SA 4.0

About the plant

What it is and where it grows — not part of any germination protocol.

Habit
shrubPlants of the World Online
Native range
Western AustraliaGBIF Backbone Taxonomy

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around December 21, 2026 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 105 days to germinate.

30% germination in 105 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Calothamnus p. 110Public domain
Show the original text
Calothamnus (Myrtaceae). M. quadrifidus germ.70L(30% in 15 w), 70D GA-3(30% in 4L15 d), 70D(8%), 40(22% in 5th w), and 30% in October and November with seeds placed outdoors in September. The differences in percent germinations may not be significant because of difficulties in counting the seeds.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Calothamnus 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 Moderate Rated by us, not by the source.

Start around March 21, 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 15 days to germinate.

30% germination in 15 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Calothamnus p. 110Public domain
Show the original text
Calothamnus (Myrtaceae). M. quadrifidus germ.70L(30% in 15 w), 70D GA-3(30% in 4L15 d), 70D(8%), 40(22% in 5th w), and 30% in October and November with seeds placed outdoors in September. The differences in percent germinations may not be significant because of difficulties in counting the seeds.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Calothamnus 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

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

Germination happens during step 1, in 35 days.

22% germination in 35 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Calothamnus p. 110Public domain
Show the original text
Calothamnus (Myrtaceae). M. quadrifidus germ.70L(30% in 15 w), 70D GA-3(30% in 4L15 d), 70D(8%), 40(22% in 5th w), and 30% in October and November with seeds placed outdoors in September. The differences in percent germinations may not be significant because of difficulties in counting the seeds.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Calothamnus 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 4

DerivedN. C. Deno, 1993

Difficulty Very high Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Germination time not stated; 21 days assumed.

8% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Calothamnus p. 110Public domain
Show the original text
Calothamnus (Myrtaceae). M. quadrifidus germ.70L(30% in 15 w), 70D GA-3(30% in 4L15 d), 70D(8%), 40(22% in 5th w), and 30% in October and November with seeds placed outdoors in September. The differences in percent germinations may not be significant because of difficulties in counting the seeds.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Calothamnus 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.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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