Deno’s Garden

Cephalanthus occidentalis

Genus Cephalanthus

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. Sow and cover

    Temperature: 70°F 21°C Light: light

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

80% germination in 21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cephalanthus p. 116Public domain
Show the original text
Cephalanthus (Rubiaceae). C. occidentalis has an absolute light requirement for germination, and none germ. in the dark as shown by 70L(80-90% in 1 3 w), 40-70L(80-90% in 13 w), and none in 70D or 40-70D. Results were the same for fresh seed or seed DS 6 m at 70 or 40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cephalanthus p. 116. 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 July 9, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 8, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

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

about 6 months from start to sowing. Then 91 days to germinate.

80% germination in 91 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cephalanthus p. 116Public domain
Show the original text
Cephalanthus (Rubiaceae). C. occidentalis has an absolute light requirement for germination, and none germ. in the dark as shown by 70L(80-90% in 1 3 w), 40-70L(80-90% in 13 w), and none in 70D or 40-70D. Results were the same for fresh seed or seed DS 6 m at 70 or 40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cephalanthus p. 116. 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

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Cephalanthus p. 116Public domain
Show the original text
Cephalanthus (Rubiaceae). C. occidentalis has an absolute light requirement for germination, and none germ. in the dark as shown by 70L(80-90% in 1 3 w), 40-70L(80-90% in 13 w), and none in 70D or 40-70D. Results were the same for fresh seed or seed DS 6 m at 70 or 40.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Cephalanthus p. 116. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.