Texas · zones 7a–10a
When to plant basil in Texas.
Sow or transplant between Apr 2 to Jun 18 in a typical year, keyed to Texas's median last frost around Mar 12. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Basil dates for a typical Texas season.
1 · Start indoors
Feb 19 to May 7
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
Apr 2 to Jun 18
Keyed to the ~Mar 12 last frost. Sow 0.25" deep, 8" apart.
Harvest
~40 days later
~0.5 lb per plant over ~12 weeks.
Texas spans more than one climate: Zone 8 is the most common zone, but the state runs 7a to 10a. That's why the planner works from your ZIP code's frost dates, not your zone: mountain and coastal gardens in the same state can be three weeks apart.
Texas growing notes
Texas heat is basil's friend, until it turns on you.
One state, two very different starts
Texas basil growers are not all playing the same game. The Panhandle sits in zone 7a with a real winter and a slow spring warm-up, while the Rio Grande Valley reaches into zone 10a and barely sees frost most winters. Basil is frost-tender no matter which end of the state you garden in, so the trigger for setting transplants out is a plain feel test, not the calendar: kneel down and press a bare hand into the bed each morning, and hold off until the ground reads warm rather than cool against your palm for a full week straight.
That warm-soil moment can arrive a full 6 to 8 weeks earlier in the Valley than in the Panhandle, so a Panhandle gardener copying a Valley neighbor's start date loses transplants to a late cold snap almost every year. If your county extension office lists a different average last frost than a friend three hours away, trust your own hand test over their calendar. Once plants are in, give each one a full 8 inches of elbow room; basil crowded tighter than that stays humid at the base even in a dry Panhandle bed, which invites the same rot problems Gulf Coast gardeners fight all season.
Heat does not slow basil down, it speeds it up
Most vegetables sulk in Texas heat; basil does the opposite and races toward flowering. Once daytime highs sit consistently above 90 degrees, a healthy plant can push a flower spike within 3 weeks of its last pinch. Check the growing tip of every stem weekly: the moment you see a tiny cluster of buds forming where two leaves meet, pinch it out that day. Left even a week, the leaves nearby turn noticeably more peppery and the plant's energy shifts from foliage to seed.
Because Texas summer heat forces this cycle every 3 to 4 weeks instead of once a season, one planting will not carry you through summer. Set a second and third round of transplants a month apart so a fresh, unbolted planting is always coming up behind the one you are harvesting hard. A single well-kept plant here can still return roughly half a pound of leaf over the season, but only if you keep breaking the bolt cycle instead of losing one planting to seed and starting over.
Gulf humidity versus Panhandle dryness changes the threat
Along the Gulf Coast and through Houston, thick summer humidity makes downy mildew the basil grower's main worry: yellow blotches on top of a leaf paired with gray fuzz on the underside, worst after a run of muggy nights. Prospera and Amazel were bred specifically for resistance to this disease and are worth seeking out if you garden anywhere near the coast; classic Genovese has none.
Out in the drier Panhandle and West Texas, spider mites replace mildew as the main pest, thriving in hot, dust-dry conditions. Check the underside of leaves and the stem joints for fine webbing and a stippled, dusty look; a strong blast of water on the underside of leaves twice a week breaks up mite colonies without chemicals and is often enough on its own. Either region, skip overhead irrigation late in the day; wet leaves at dusk feed the coastal mildew, and dust that settles on dry leaves feeds the inland mites.
In Texas: watch for
The pests that find basil here.
With about 255 frost-free days, basil spends longer in the ground here than in most of the country, which widens the window in which aphids can find it. Scout weekly from midseason and act on the first signs.
Fine webbing and pale stippling in hot, dry spells.
Organic fix: Spray the undersides with water, then insecticidal soap or neem.
Yellowing with gray fuzz underneath, or white powder on top.
Organic fix: Space for airflow, water at the base, spray neem.
Metallic beetles chewing basil and mint leaves to lace.
Organic fix: Handpick into soapy water in the morning; neem.
Your season math: Texas gives basil about 255 frost-free days, and it needs roughly 40 days to a first harvest. It's a one-planting crop, so time that single sowing well.
Planting basil in Texas: questions
When should I plant basil in Texas?+
In a typical Texas year, sow basil or set out transplants between Apr 2 to Jun 18, keyed to the state's median last frost around Mar 12. Your exact dates shift with your ZIP code and microclimate.
When do I start basil seeds indoors in Texas?+
Start seeds inside about 6 weeks before set-out: roughly Feb 19 to May 7 for a typical Texas season.
What USDA zone is Texas?+
Texas spans zones 7a–10a, mostly zone 8. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many basil plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.