Eryngium yuccifolium
Genus Eryngium
This source reports two treatments. Both are shown.
Protocol 1
DerivedN. C. Deno, 1993Difficulty Low 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.
84% germination in 56–77 days.
This source doesn't state how long.
Protocol 2
DerivedN. C. Deno, 1993Difficulty High Rated by us, not by the source.
- 1
Sow outdoors and leave it
Up in April.
No stated waiting before sowing.
20% germination.
This source doesn't state how long.