Deno’s Garden

Arum italicum

Genus Arum

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around June 19, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 18, 2026.

  1. Warm moist stratification

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

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

75% germination.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Arum p. 15Public domain
Show the original text
Arum (Araceae). A. italicum germ. 70D-40-70D(75% in MO d) and 40-70D-40-70D(5/8 in 1-3 w)- 40-70D(1/8). Seeds DS 1 y were dead.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Arum p. 15. 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, 1998

Difficulty High 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 Light: dark

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

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

  5. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  6. Warm moist stratification

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

    1/8 germinated in this phase.

Steps after step 4 run on after germination.

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

62% germination in 7–21 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Arum p. 15Public domain
Show the original text
Arum (Araceae). A. italicum germ. 70D-40-70D(75% in MO d) and 40-70D-40-70D(5/8 in 1-3 w)- 40-70D(1/8). Seeds DS 1 y were dead.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Arum p. 15. 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.