Zone 9a Planting Calendar
Zone 9a is the colder half of Zone 9. See also: Zone 9 full calendar
Last updated: May 15, 2026Zone 9a Climate Facts
Last Spring FrostMar 7
First Fall FrostNov 18
Growing Season256 days
Plants Available50 varieties
All Plants for Zone 9a
π Data Sources
Frost dates: NOAA Climate Normals 1991β2020, National Centers for Environmental Information.Hardiness zones: USDA Plant Hardiness Zone Map, Agricultural Research Service.
Growing requirements: Cooperative Extension Services β NC State, Penn State, University of Florida IFAS.
Companion planting: Cornell University Cooperative Extension.
Data compiled from public agricultural sources. Always verify with your local extension office for micro-climate adjustments.