Deno’s Garden

Arum concinnatum

Genus Arum

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around September 17, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on September 16, 2025.

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°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

about 1.5 years from start to sowing. Then 21 days to germinate.

86% germination in 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. concinnatum germ. 70D(75% in 3-13 w)-40(25% in 3rd w) and 40(10%)-70D- 40(50% in 4th w). Seeds DS 1 y germ. 70D(60% in 8-12 w)-40(30% in 6th w) similar to the fresh seeds, but seeds DS 2 y germ. 70D-40(6/7 in 3rd w).
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 Moderate Rated by us, not by the source.

Start around October 6, 2026 for a May 3 last frost.

  1. Warm moist stratification

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

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    25 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 91 days to germinate.

75% germination in 21–91 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. concinnatum germ. 70D(75% in 3-13 w)-40(25% in 3rd w) and 40(10%)-70D- 40(50% in 4th w). Seeds DS 1 y germ. 70D(60% in 8-12 w)-40(30% in 6th w) similar to the fresh seeds, but seeds DS 2 y germ. 70D-40(6/7 in 3rd w).
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 3

DerivedN. C. Deno, 1998

Difficulty Moderate Rated by us, not by the source.

Start around October 14, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on October 13, 2025.

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°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

    30 germinated in this phase.

Steps after step 2 run on after germination.

about 15 months from start to sowing. Then 84 days to germinate.

60% germination in 56–84 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. concinnatum germ. 70D(75% in 3-13 w)-40(25% in 3rd w) and 40(10%)-70D- 40(50% in 4th w). Seeds DS 1 y germ. 70D(60% in 8-12 w)-40(30% in 6th w) similar to the fresh seeds, but seeds DS 2 y germ. 70D-40(6/7 in 3rd w).
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 4

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around June 12, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on June 11, 2026.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    10 germinated in this phase.

  2. Warm moist stratification

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

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

about 9 months from start to sowing. Then 28 days to germinate.

50% germination in 28 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. concinnatum germ. 70D(75% in 3-13 w)-40(25% in 3rd w) and 40(10%)-70D- 40(50% in 4th w). Seeds DS 1 y germ. 70D(60% in 8-12 w)-40(30% in 6th w) similar to the fresh seeds, but seeds DS 2 y germ. 70D-40(6/7 in 3rd w).
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.