Deno’s Garden

Gymnospermium altaicum

Genus Gymnospermium

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around October 27, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 70 days to germinate.

70% germination in 49–70 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Gymnospermium p. 150Public domain
Show the original text
Gymnospermium (Berberidaceae). G. altaicum germ. 70-40(50% in 12th w)-70(40% in 2nd d) and 40(70% 7-10 w)-70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Gymnospermium p. 150. 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 High Rated by us, not by the source.

Start around July 16, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on July 15, 2026.

  1. Warm moist stratification

    Duration: 90 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

    40 germinated in this phase.

Steps after step 2 run on after germination.

about 6 months from start to sowing. Then 84 days to germinate.

50% germination in 84 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Gymnospermium p. 150Public domain
Show the original text
Gymnospermium (Berberidaceae). G. altaicum germ. 70-40(50% in 12th w)-70(40% in 2nd d) and 40(70% 7-10 w)-70.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Gymnospermium p. 150. 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.