Deno’s Garden

Acer platanoides

Genus Acer

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

  1. Sow outdoors and leave it

No stated waiting before sowing.

93% germination.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Acer p. 83Public domain
Show the original text
Acer (Aceraceae). The three dominant themes in this genus are the diversity of germination behaviors, the presence of impervious seed coats in about half of the species, and the large percentages (90% an more) of empty seed coats in some of the samples even though the seeds were collected from thriving natural colonies. The genus divides into three groups. (a) Seeds ripen in late spring, germinate immediately at 70 (and 40), and do not survive dry storage. (b) Seeds ripen in fall, tolerate dry storage, and usually germinate at 40. (c) Seeds ripen in fall, usually tolerate dry storage, have an impervious seed coat, and mayor may not have inhibitors. The discovery of an impervious seed coat in A. platanoides germ. at 40, and fresh seeds should be sown immediately at either 40 or outdoors as exposure to moist conditions at 70 is deleterious. Fresh seed germ. 40(41% in 12th w)-70(23% in 2-3 d), 70-40(13% in 10-12 w)-70(4% on 2nd d), and 93% in outdoor treatment with germination taking place in late winter and early spring. Germination would have been greater at 40 if the time at 40 had been extended beyond 3 m. Opening the seed coats has no effect. Seeds collected in December gave the same results as seeds collected in October showing that some DS at 40 is tolerated. However, there is significant deterioration] of the seeds and hardening of the seed coats when DS for 6 m at 70. The. DS seeds germ. 38% in 4-7 w at 40 but only if the seed coats were removed. The seedlings were weak and did not survive. DS should be avoided. .
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Acer p. 83. 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 Moderate Rated by us, not by the source.

Start around October 13, 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

    23 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 84 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Acer p. 83Public domain
Show the original text
Acer (Aceraceae). The three dominant themes in this genus are the diversity of germination behaviors, the presence of impervious seed coats in about half of the species, and the large percentages (90% an more) of empty seed coats in some of the samples even though the seeds were collected from thriving natural colonies. The genus divides into three groups. (a) Seeds ripen in late spring, germinate immediately at 70 (and 40), and do not survive dry storage. (b) Seeds ripen in fall, tolerate dry storage, and usually germinate at 40. (c) Seeds ripen in fall, usually tolerate dry storage, have an impervious seed coat, and mayor may not have inhibitors. The discovery of an impervious seed coat in A. platanoides germ. at 40, and fresh seeds should be sown immediately at either 40 or outdoors as exposure to moist conditions at 70 is deleterious. Fresh seed germ. 40(41% in 12th w)-70(23% in 2-3 d), 70-40(13% in 10-12 w)-70(4% on 2nd d), and 93% in outdoor treatment with germination taking place in late winter and early spring. Germination would have been greater at 40 if the time at 40 had been extended beyond 3 m. Opening the seed coats has no effect. Seeds collected in December gave the same results as seeds collected in October showing that some DS at 40 is tolerated. However, there is significant deterioration] of the seeds and hardening of the seed coats when DS for 6 m at 70. The. DS seeds germ. 38% in 4-7 w at 40 but only if the seed coats were removed. The seedlings were weak and did not survive. DS should be avoided. .
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Acer p. 83. 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 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

    4 germinated in this phase.

Steps after step 2 run on after germination.

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

13% germination in 70–84 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Acer p. 83Public domain
Show the original text
Acer (Aceraceae). The three dominant themes in this genus are the diversity of germination behaviors, the presence of impervious seed coats in about half of the species, and the large percentages (90% an more) of empty seed coats in some of the samples even though the seeds were collected from thriving natural colonies. The genus divides into three groups. (a) Seeds ripen in late spring, germinate immediately at 70 (and 40), and do not survive dry storage. (b) Seeds ripen in fall, tolerate dry storage, and usually germinate at 40. (c) Seeds ripen in fall, usually tolerate dry storage, have an impervious seed coat, and mayor may not have inhibitors. The discovery of an impervious seed coat in A. platanoides germ. at 40, and fresh seeds should be sown immediately at either 40 or outdoors as exposure to moist conditions at 70 is deleterious. Fresh seed germ. 40(41% in 12th w)-70(23% in 2-3 d), 70-40(13% in 10-12 w)-70(4% on 2nd d), and 93% in outdoor treatment with germination taking place in late winter and early spring. Germination would have been greater at 40 if the time at 40 had been extended beyond 3 m. Opening the seed coats has no effect. Seeds collected in December gave the same results as seeds collected in October showing that some DS at 40 is tolerated. However, there is significant deterioration] of the seeds and hardening of the seed coats when DS for 6 m at 70. The. DS seeds germ. 38% in 4-7 w at 40 but only if the seed coats were removed. The seedlings were weak and did not survive. DS should be avoided. .
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Acer p. 83. 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.