Growing brussels sprouts in zone 9a

In USDA zone 9a, the typical last spring frost is March 2 and the first fall frost is November 26. Here is when to plant brussels sprouts 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 brussels sprouts from Utah State University Extension. Zone dates are medians; local conditions vary.