Deno’s Garden

Arisaema thunbergii

Genus Arisaema

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around March 8, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 79°F 26°C

No stated waiting before sowing. Then 28 days to germinate.

100% germination in 14–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Arisaema p. 100Public domain
Show the original text
Arisaema (Araceae). The Asiatic species were received as dried berries in midwinter and germ. readily at 70 after WC for 7 d. The American species exhibited complex behavior. Germination is hypogeal in all species. The seed forms a corm and root system before sending up the single true leaf. This first true leaf is a single leaflet in A. thunbergii germ. readily, but difficulties were encountered in getting the trifoliate leaf to develop. The majority of seedlings ultimately rotted and never developed a leaf. Seed received in December in dried fruit germ. 79(100% in 2-4 w) and 40(20% in 9-12 w) -70(80% in 1-7 d). Leaf development was erratic. A few seedlings developed the leaf at 70 in 2-4 w after germination, but the majority did not. Shifting the seedlings to 40 for 3 m and back to 70 led to a few seedlings developing a leaf, but again the majority did not. Seed kept an additional 6 m at 40 in the dried fruit germ. 70(81% in 2-4 w)-40(12%) and 40(82% in 5-12 w)-70(6%). These seedlings produced a system of branching roots up to 3 inches long, but the roots were very thin and colorless. On shifting to 70, these fine roots died back to the tuber, and leaves failed to develop over several alternating cycles.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Arisaema p. 100. 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

    6 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 84 days to germinate.

82% germination in 35–84 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Arisaema p. 100Public domain
Show the original text
Arisaema (Araceae). The Asiatic species were received as dried berries in midwinter and germ. readily at 70 after WC for 7 d. The American species exhibited complex behavior. Germination is hypogeal in all species. The seed forms a corm and root system before sending up the single true leaf. This first true leaf is a single leaflet in A. thunbergii germ. readily, but difficulties were encountered in getting the trifoliate leaf to develop. The majority of seedlings ultimately rotted and never developed a leaf. Seed received in December in dried fruit germ. 79(100% in 2-4 w) and 40(20% in 9-12 w) -70(80% in 1-7 d). Leaf development was erratic. A few seedlings developed the leaf at 70 in 2-4 w after germination, but the majority did not. Shifting the seedlings to 40 for 3 m and back to 70 led to a few seedlings developing a leaf, but again the majority did not. Seed kept an additional 6 m at 40 in the dried fruit germ. 70(81% in 2-4 w)-40(12%) and 40(82% in 5-12 w)-70(6%). These seedlings produced a system of branching roots up to 3 inches long, but the roots were very thin and colorless. On shifting to 70, these fine roots died back to the tuber, and leaves failed to develop over several alternating cycles.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Arisaema p. 100. 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 Moderate Rated by us, not by the source.

Start around December 8, 2026 for a May 3 last frost.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    12 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 28 days to germinate.

81% germination in 14–28 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Arisaema p. 100Public domain
Show the original text
Arisaema (Araceae). The Asiatic species were received as dried berries in midwinter and germ. readily at 70 after WC for 7 d. The American species exhibited complex behavior. Germination is hypogeal in all species. The seed forms a corm and root system before sending up the single true leaf. This first true leaf is a single leaflet in A. thunbergii germ. readily, but difficulties were encountered in getting the trifoliate leaf to develop. The majority of seedlings ultimately rotted and never developed a leaf. Seed received in December in dried fruit germ. 79(100% in 2-4 w) and 40(20% in 9-12 w) -70(80% in 1-7 d). Leaf development was erratic. A few seedlings developed the leaf at 70 in 2-4 w after germination, but the majority did not. Shifting the seedlings to 40 for 3 m and back to 70 led to a few seedlings developing a leaf, but again the majority did not. Seed kept an additional 6 m at 40 in the dried fruit germ. 70(81% in 2-4 w)-40(12%) and 40(82% in 5-12 w)-70(6%). These seedlings produced a system of branching roots up to 3 inches long, but the roots were very thin and colorless. On shifting to 70, these fine roots died back to the tuber, and leaves failed to develop over several alternating cycles.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Arisaema p. 100. 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, 1993

Difficulty Moderate Rated by us, not by the source.

Start around September 30, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    20 germinated in this phase.

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C

about 6 months from start to sowing. Then 7 days to germinate.

80% germination in 1–7 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Arisaema p. 100Public domain
Show the original text
Arisaema (Araceae). The Asiatic species were received as dried berries in midwinter and germ. readily at 70 after WC for 7 d. The American species exhibited complex behavior. Germination is hypogeal in all species. The seed forms a corm and root system before sending up the single true leaf. This first true leaf is a single leaflet in A. thunbergii germ. readily, but difficulties were encountered in getting the trifoliate leaf to develop. The majority of seedlings ultimately rotted and never developed a leaf. Seed received in December in dried fruit germ. 79(100% in 2-4 w) and 40(20% in 9-12 w) -70(80% in 1-7 d). Leaf development was erratic. A few seedlings developed the leaf at 70 in 2-4 w after germination, but the majority did not. Shifting the seedlings to 40 for 3 m and back to 70 led to a few seedlings developing a leaf, but again the majority did not. Seed kept an additional 6 m at 40 in the dried fruit germ. 70(81% in 2-4 w)-40(12%) and 40(82% in 5-12 w)-70(6%). These seedlings produced a system of branching roots up to 3 inches long, but the roots were very thin and colorless. On shifting to 70, these fine roots died back to the tuber, and leaves failed to develop over several alternating cycles.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Arisaema p. 100. 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.