Betonica macrantha
Genus Betonica
Two sources report two treatments between them. Both are shown.
Protocol 1
DerivedN. C. Deno, 1998Difficulty Very high Rated by us, not by the source.
Start around March 23, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 22, 2024.
- 1
Dry storage
Duration: 1095 days · Temperature: 70°F 21°C
- 2
Sow and cover
Temperature: 70°F 21°C · Light: dark
about 3 years from start to sowing. Then 14 days to germinate.
4% germination in 14 days.
Protocol 2
DerivedN. C. Deno, 1993Difficulty Moderate Rated by us, not by the source.
Sow around March 1, 2027 — a date the source gives, not one counted back from a May 3 last frost.
- 1
Dry storage
Duration: 180 days · Temperature: 70°F 21°C
- 2
Sow outdoors and leave it
Sown outdoors in March 1; up in April.
about 6 months from start to sowing. Then 30 days to germinate.
31% germination in 30 days.
This source doesn't state how long.