Deno’s Garden

Cynanchum acutum

Genus Cynanchum

Two sources report 4 treatments between them. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty High Rated by us, not by the source.

Start around December 22, 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

  3. Warm moist stratification

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

    1/7 germinated in this phase.

Steps after step 1 run on after germination.

about 3 months from start to sowing. Then 14 days to germinate.

43% germination in 14 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Cynanchum p. 27Public domain
Show the original text
Cynanchum (Asciepediaceae). C. acutum germ. 70D(3/7 in 2nd w)-40- 70D(1/7 on 2nd d) and 70L(4/5 in 2nd w).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Cynanchum p. 27. 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 Low Rated by us, not by the source.

Start around March 22, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 14 days to germinate.

80% germination in 14 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Cynanchum p. 27Public domain
Show the original text
Cynanchum (Asciepediaceae). C. acutum germ. 70D(3/7 in 2nd w)-40- 70D(1/7 on 2nd d) and 70L(4/5 in 2nd w).
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Cynanchum p. 27. 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, 1996

Difficulty Moderate Rated by us, not by the source.

Start around March 22, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 14 days to germinate.

43% germination in 14 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cynanchum p. 35Public domain
Show the original text
Cynanchum (Asclepediaceae). C. acutum germ. 70D(3/7 in 2nd w) and 70L(4/5 in 8-14 d).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cynanchum p. 35. 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, 1996

Difficulty Low Rated by us, not by the source.

Start around March 22, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 14 days to germinate.

80% germination in 8–14 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cynanchum p. 35Public domain
Show the original text
Cynanchum (Asclepediaceae). C. acutum germ. 70D(3/7 in 2nd w) and 70L(4/5 in 8-14 d).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cynanchum p. 35. 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.