Deno’s Garden

Shepherdia canadensis

Genus Shepherdia

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around December 26, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 25, 2025.

  1. Warm moist stratification

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

    4 germinated in this phase.

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

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

    20 germinated in this phase.

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

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

about 15 months from start to sowing. Then 16 days to germinate.

70% germination in 2–16 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Shepherdia p. 77Public domain
Show the original text
Shepherdia (Eleaganceae). S. canadensis germ. 70D(4%)-40-70D(20% in 2nd w)-40-70D(70% in 2-16 d), 70L-40-70D(25% in 1-6 w)-40-70D(45%), 40- 70D(4%)-40-70D(48% on 5-7 d), and 35% in Aügust-October in OT from seeds started in February. There was no further germination the following spring in OT. GA-3 had littie effect, and light had only a minor effect.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Shepherdia p. 77. 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, 1996

Difficulty High Rated by us, not by the source.

Start around April 4, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on April 3, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

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

    4 germinated in this phase.

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

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

about 12 months from start to sowing. Then 7 days to germinate.

48% germination in 5–7 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Shepherdia p. 77Public domain
Show the original text
Shepherdia (Eleaganceae). S. canadensis germ. 70D(4%)-40-70D(20% in 2nd w)-40-70D(70% in 2-16 d), 70L-40-70D(25% in 1-6 w)-40-70D(45%), 40- 70D(4%)-40-70D(48% on 5-7 d), and 35% in Aügust-October in OT from seeds started in February. There was no further germination the following spring in OT. GA-3 had littie effect, and light had only a minor effect.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Shepherdia p. 77. 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, 1996

Difficulty High Rated by us, not by the source.

Start around December 21, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 20, 2025.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

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

    25 germinated in this phase.

  4. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  5. Warm moist stratification

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

about 15 months from start to sowing. Germination time not stated; 21 days assumed.

45% germination.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Shepherdia p. 77Public domain
Show the original text
Shepherdia (Eleaganceae). S. canadensis germ. 70D(4%)-40-70D(20% in 2nd w)-40-70D(70% in 2-16 d), 70L-40-70D(25% in 1-6 w)-40-70D(45%), 40- 70D(4%)-40-70D(48% on 5-7 d), and 35% in Aügust-October in OT from seeds started in February. There was no further germination the following spring in OT. GA-3 had littie effect, and light had only a minor effect.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Shepherdia p. 77. 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.