Deno’s Garden

Betula pendula

Genus Betula

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Sow outdoors and leave it

    Up in April.

about 6 months from start to sowing.

10% germination.

This source doesn't state how long.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Betula p. 25Public domain
Show the original text
Betula (Betulaceae). Light and/or 40-70 patterns were best. B. platyphylla japonica germ. best in a 40-70 or a 70L pattern. Seeds DS 6 m germ. 40-70D(8% in 6-10 d), 70L(9% in 7-11 d), 70 GA-3(6% on 9th d), 70D(none), and 10% in April in OT. Seeds DS 1 y gave about the same results, but seeds DS 2 y germ. only 3% in 2nd w in 70L.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Betula p. 25. 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 Very high Rated by us, not by the source.

Start around September 26, 2026 for a May 3 last frost.

  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 11 days to germinate.

9% germination in 7–11 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Betula p. 25Public domain
Show the original text
Betula (Betulaceae). Light and/or 40-70 patterns were best. B. platyphylla japonica germ. best in a 40-70 or a 70L pattern. Seeds DS 6 m germ. 40-70D(8% in 6-10 d), 70L(9% in 7-11 d), 70 GA-3(6% on 9th d), 70D(none), and 10% in April in OT. Seeds DS 1 y gave about the same results, but seeds DS 2 y germ. only 3% in 2nd w in 70L.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Betula p. 25. 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 Very high Rated by us, not by the source.

Start around April 1, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 31, 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 10 days to germinate.

8% germination in 6–10 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Betula p. 25Public domain
Show the original text
Betula (Betulaceae). Light and/or 40-70 patterns were best. B. platyphylla japonica germ. best in a 40-70 or a 70L pattern. Seeds DS 6 m germ. 40-70D(8% in 6-10 d), 70L(9% in 7-11 d), 70 GA-3(6% on 9th d), 70D(none), and 10% in April in OT. Seeds DS 1 y gave about the same results, but seeds DS 2 y germ. only 3% in 2nd w in 70L.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Betula p. 25. 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, 1996

Difficulty Very high Rated by us, not by the source.

Start around September 28, 2026 for a May 3 last frost.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Gibberellic acid soak

  3. Sow and cover

    Temperature: 70°F 21°C

about 6 months from start to sowing. Then 9 days to germinate.

6% germination in 9 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Betula p. 25Public domain
Show the original text
Betula (Betulaceae). Light and/or 40-70 patterns were best. B. platyphylla japonica germ. best in a 40-70 or a 70L pattern. Seeds DS 6 m germ. 40-70D(8% in 6-10 d), 70L(9% in 7-11 d), 70 GA-3(6% on 9th d), 70D(none), and 10% in April in OT. Seeds DS 1 y gave about the same results, but seeds DS 2 y germ. only 3% in 2nd w in 70L.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Betula p. 25. 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.