Deno’s Garden

Hydrangea hydrangeoides

Genus Hydrangea

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

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.

100% germination in 28 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Schizophragma p. 61Public domain
Show the original text
Schizophragma (Saxifragaceae). S. integrifolium DS 6 m germ. 70L(100% in 4th w), 70D(25% in'4-9 w), 40-70L(100% in 2-4 w), and 40-70D(50% in 6th w). The seeds are very small so that percent germinations are questionable. The somewhat positive effect of light is more evident in the faster rate of germination. Seeds DS 1 y were dead
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Schizophragma p. 61. 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, 1998

Difficulty Moderate Rated by us, not by the source.

Start around March 14, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 13, 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. Then 28 days to germinate.

100% germination in 14–28 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Schizophragma p. 61Public domain
Show the original text
Schizophragma (Saxifragaceae). S. integrifolium DS 6 m germ. 70L(100% in 4th w), 70D(25% in'4-9 w), 40-70L(100% in 2-4 w), and 40-70D(50% in 6th w). The seeds are very small so that percent germinations are questionable. The somewhat positive effect of light is more evident in the faster rate of germination. Seeds DS 1 y were dead
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Schizophragma p. 61. 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, 1998

Difficulty Moderate Rated by us, not by the source.

Start around February 28, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on February 27, 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: dark

about 12 months from start to sowing. Then 42 days to germinate.

50% germination in 42 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Schizophragma p. 61Public domain
Show the original text
Schizophragma (Saxifragaceae). S. integrifolium DS 6 m germ. 70L(100% in 4th w), 70D(25% in'4-9 w), 40-70L(100% in 2-4 w), and 40-70D(50% in 6th w). The seeds are very small so that percent germinations are questionable. The somewhat positive effect of light is more evident in the faster rate of germination. Seeds DS 1 y were dead
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Schizophragma p. 61. 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, 1998

Difficulty High Rated by us, not by the source.

Start around August 6, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on August 5, 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 63 days to germinate.

25% germination in 28–63 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Schizophragma p. 61Public domain
Show the original text
Schizophragma (Saxifragaceae). S. integrifolium DS 6 m germ. 70L(100% in 4th w), 70D(25% in'4-9 w), 40-70L(100% in 2-4 w), and 40-70D(50% in 6th w). The seeds are very small so that percent germinations are questionable. The somewhat positive effect of light is more evident in the faster rate of germination. Seeds DS 1 y were dead
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Schizophragma p. 61. 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.