Growing black-eyed susan in zone 6a

(Zone 6a = an average winter low of -10°F to -5°F.)

In USDA zone 6a, the typical last spring frost is April 29 and the first fall frost is October 16. Here is when to plant black-eyed susan against those dates.

USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service / Oregon State University PRISM Group. NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020. Planting windows for black-eyed susan from University of Wisconsin-Madison Division of Extension (Wisconsin Horticulture). Zone dates are medians; local conditions vary.