Ipomoea leptophylla
Genus Ipomoea
This source reports two treatments. Both are shown.
Protocol 1
DerivedN. C. Deno, 1993Difficulty Moderate Rated by us, not by the source.
Start around March 23, 2027 for a May 3 last frost.
- 1
Sow and cover
Temperature: 70°F 21°C
No stated waiting before sowing. Then 13 days to germinate.
42% germination in 3–13 days.
Protocol 2
DerivedN. C. Deno, 1993Difficulty High Rated by us, not by the source.
Start around January 18, 2027 for a May 3 last frost.
- 1
Cold moist stratification
Temperature: 40°F 4°C
No stated waiting before sowing. Then 77 days to germinate.
19% germination in 42–77 days.
This source doesn't state how long.