Growing globe amaranth in zone 4a

(Zone 4a = an average winter low of -30°F to -25°F.)

In USDA zone 4a, the typical last spring frost is May 12 and the first fall frost is September 28. Here is when to plant globe amaranth 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 globe amaranth from University of Wisconsin-Madison Division of Extension (Wisconsin Horticulture). Zone dates are medians; local conditions vary.