Growing radishes in zone 9
The fastest vegetable in the garden — and the most often ruined by crowding, so thin early. Sow small amounts weekly; in summer heat they bolt and turn pithy, so pause until fall.
Zone 9 covers gulf Coast, central Florida, central California, Phoenix and Tucson — summer heat is the limiting factor — many "spring" crops grow best in fall and winter. Zone dates are medians: frost timing varies within a zone with elevation and terrain, so treat these windows as a solid default and refine them with your own city’s dates below.
Make it local
These windows use zone 9's typical frost dates (last frost ~Feb 20, first frost ~Dec 1). For windows computed from your frost dates, run the ZIP code frost lookup and open the planting calendar — it remembers your city. The seed starting scheduler turns the whole seed rack into one printable, date-sorted list.
Frequently asked questions
When do I plant radishes in zone 9?
Direct sow Jan 16 – Jan 30, counted from zone 9's typical last frost around Feb 20. As a hardy crop it tolerates the light frosts on either side of that window.
Can I direct sow radishes in zone 9?
Yes — direct sow Jan 16 – Jan 30. This crop prefers direct sowing; its roots dislike transplanting.
Can I plant radishes for a fall harvest in zone 9?
Yes — sow Oct 20 – Nov 3, counted back from the typical Dec 1 first frost so plants mature before serious cold. Light fall frosts improve flavor rather than ending the crop.