Deno’s Garden

Dioscorea villosa

Genus Dioscorea

This source reports 4 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around April 3, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on April 2, 2026.

  1. Dry storage

    Duration: 180 daysTemperature: 70°F 21°C

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

  3. Warm moist stratification

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

about 12 months from start to sowing. Then 8 days to germinate.

77% germination in 1–8 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Dioscorea p. 133Public domain
Show the original text
Dioscorea (Dloscoriaceae). D. villosa germination (at 70) was benefittd by both DS and by a preliminary 3 m at 40. Germination was best using seed DS 6 m at 70 in 40-70(77% in 1-8 d). It also germ. 70(11% in- 1-3 w) for DS seed and 70(20% in 3-8 w)-40-70(37%), 40-70(44% in 2nd w), and 52% in spring in outdoor treatment using fresh seed.. Light had no effect. Seed DS 12 m at 70 germ. 70(6%)-40-70(5%) showing that DS for this long was detrimental. The seeds are thin wafers like Lilium and empty seed coats can be detected readily making seed counts accurate.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Dioscorea p. 133. 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 September 23, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

  2. Warm moist stratification

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

about 6 months from start to sowing. Then 14 days to germinate.

44% germination in 14 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Dioscorea p. 133Public domain
Show the original text
Dioscorea (Dloscoriaceae). D. villosa germination (at 70) was benefittd by both DS and by a preliminary 3 m at 40. Germination was best using seed DS 6 m at 70 in 40-70(77% in 1-8 d). It also germ. 70(11% in- 1-3 w) for DS seed and 70(20% in 3-8 w)-40-70(37%), 40-70(44% in 2nd w), and 52% in spring in outdoor treatment using fresh seed.. Light had no effect. Seed DS 12 m at 70 germ. 70(6%)-40-70(5%) showing that DS for this long was detrimental. The seeds are thin wafers like Lilium and empty seed coats can be detected readily making seed counts accurate.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Dioscorea p. 133. 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 High 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: either

    20 germinated in this phase.

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

  3. Warm moist stratification

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

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

37% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Dioscorea p. 133Public domain
Show the original text
Dioscorea (Dloscoriaceae). D. villosa germination (at 70) was benefittd by both DS and by a preliminary 3 m at 40. Germination was best using seed DS 6 m at 70 in 40-70(77% in 1-8 d). It also germ. 70(11% in- 1-3 w) for DS seed and 70(20% in 3-8 w)-40-70(37%), 40-70(44% in 2nd w), and 52% in spring in outdoor treatment using fresh seed.. Light had no effect. Seed DS 12 m at 70 germ. 70(6%)-40-70(5%) showing that DS for this long was detrimental. The seeds are thin wafers like Lilium and empty seed coats can be detected readily making seed counts accurate.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Dioscorea p. 133. 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 Very high Rated by us, not by the source.

Start around December 21, 2026 for a May 3 last frost. Too late for spring 2027 — that needed starting on December 20, 2025.

  1. Dry storage

    Duration: 360 daysTemperature: 70°F 21°C

  2. Warm moist stratification

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

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

  4. Warm moist stratification

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

    5 germinated in this phase.

Steps after step 2 run on after germination.

about 15 months from start to sowing. Germination time not stated; 21 days assumed.

6% germination.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Dioscorea p. 133Public domain
Show the original text
Dioscorea (Dloscoriaceae). D. villosa germination (at 70) was benefittd by both DS and by a preliminary 3 m at 40. Germination was best using seed DS 6 m at 70 in 40-70(77% in 1-8 d). It also germ. 70(11% in- 1-3 w) for DS seed and 70(20% in 3-8 w)-40-70(37%), 40-70(44% in 2nd w), and 52% in spring in outdoor treatment using fresh seed.. Light had no effect. Seed DS 12 m at 70 germ. 70(6%)-40-70(5%) showing that DS for this long was detrimental. The seeds are thin wafers like Lilium and empty seed coats can be detected readily making seed counts accurate.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Dioscorea p. 133. 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.