Growing sweet potatoes in zone 9
Sweet potatoes grow from slips (rooted cuttings), not seed — order them or sprout your own from a store tuber. Plant well after frost into warm soil, then dig before soil temps drop in fall and cure for sweetness.
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 sweet potatoes in zone 9?
Transplant Mar 6 – Mar 20, counted from zone 9's typical last frost around Feb 20. It has no frost tolerance — a late frost after planting means covering it or replanting.
Can I direct sow sweet potatoes in zone 9?
Not usefully in zone 9 — sweet potatoes needs more growing time than direct sowing allows, which is why it's raised from transplants .