Deno’s Garden

Exochorda racemosa

Genus Exochorda

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around January 11, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C Light: either

No stated waiting before sowing. Then 84 days to germinate.

97% germination in 49–84 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Exochorda p. 143Public domain
Show the original text
Exochorda (Rosaceae). E. grandiflora germ. best at 40(97% in 7-12 w) and poorer in 70(41% in 1-12 w)-40(36% in 5th w). Light blocks the germination at 70, but has no permanent effect since germination occurs at the same percentage and rate when shifted to 70D. Seeds DS 6 m at 70 germ. faster as shown by 40(92% in 3-6 w) and 70(79% in 1-4 w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Exochorda p. 143. 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.

Start around August 27, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 26, 2026.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Temperature: 40°F 4°C Light: either

about 6 months from start to sowing. Then 42 days to germinate.

92% germination in 21–42 days.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Exochorda p. 143Public domain
Show the original text
Exochorda (Rosaceae). E. grandiflora germ. best at 40(97% in 7-12 w) and poorer in 70(41% in 1-12 w)-40(36% in 5th w). Light blocks the germination at 70, but has no permanent effect since germination occurs at the same percentage and rate when shifted to 70D. Seeds DS 6 m at 70 germ. faster as shown by 40(92% in 3-6 w) and 70(79% in 1-4 w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Exochorda p. 143. 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: either

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

79% germination in 7–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Exochorda p. 143Public domain
Show the original text
Exochorda (Rosaceae). E. grandiflora germ. best at 40(97% in 7-12 w) and poorer in 70(41% in 1-12 w)-40(36% in 5th w). Light blocks the germination at 70, but has no permanent effect since germination occurs at the same percentage and rate when shifted to 70D. Seeds DS 6 m at 70 germ. faster as shown by 40(92% in 3-6 w) and 70(79% in 1-4 w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Exochorda p. 143. 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 October 13, 2026 for a May 3 last frost.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

    36 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 84 days to germinate.

41% germination in 7–84 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Exochorda p. 143Public domain
Show the original text
Exochorda (Rosaceae). E. grandiflora germ. best at 40(97% in 7-12 w) and poorer in 70(41% in 1-12 w)-40(36% in 5th w). Light blocks the germination at 70, but has no permanent effect since germination occurs at the same percentage and rate when shifted to 70D. Seeds DS 6 m at 70 germ. faster as shown by 40(92% in 3-6 w) and 70(79% in 1-4 w).
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Exochorda p. 143. 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.