Deno’s Garden

Juglans nigra

Genus Juglans

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty High Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

No stated waiting before sowing. Germination time not stated; 21 days assumed.

25% germination.

This source doesn't state how long.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Juglans p. 162Public domain
Show the original text
Juglans (Juglandaceae). J. nigra abundantly self sows here, but experiments have not been conducted as yet. Experiments were conducted on a sample of 16 seeds of a hybrid known as heartnut, 8 were sown at 70 and 8 at 40. Those sown at 40 germ. 2/8 in the 4th cycle at 70 whereas those sown at 70 germ. 2/8 in the 2nd cycle at 40. The remaining seeds ultimately rotted.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Juglans p. 162. 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 March 15, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Germination time not stated; 21 days assumed.

25% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Juglans p. 162Public domain
Show the original text
Juglans (Juglandaceae). J. nigra abundantly self sows here, but experiments have not been conducted as yet. Experiments were conducted on a sample of 16 seeds of a hybrid known as heartnut, 8 were sown at 70 and 8 at 40. Those sown at 40 germ. 2/8 in the 4th cycle at 70 whereas those sown at 70 germ. 2/8 in the 2nd cycle at 40. The remaining seeds ultimately rotted.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Juglans p. 162. 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.