Deno’s Garden

Arum maculatum

Genus Arum

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

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 12 months from start to sowing. Then 21 days to germinate.

80% germination in 3–21 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Arum p. 102Public domain
Show the original text
Arum (Araceae). A. maculatum germ. best in 40-70-40-70(80% in 3-21d) and less in 70-40-70-40(30% in 9-11 w). It is curious that the T at which the seed is sown directs the T at which germination ultimately occurs. Seed DS 6 m at 40 or 70 gave similar results. Germination was hypogeal like all Araceae. The true leaf did not develop properly unless the seedling was kept at 40 for 4 m after germination.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Arum p. 102. 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 January 24, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on January 23, 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. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 12 months from start to sowing. Then 77 days to germinate.

30% germination in 63–77 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Arum p. 102Public domain
Show the original text
Arum (Araceae). A. maculatum germ. best in 40-70-40-70(80% in 3-21d) and less in 70-40-70-40(30% in 9-11 w). It is curious that the T at which the seed is sown directs the T at which germination ultimately occurs. Seed DS 6 m at 40 or 70 gave similar results. Germination was hypogeal like all Araceae. The true leaf did not develop properly unless the seedling was kept at 40 for 4 m after germination.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Arum p. 102. 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.