Frost Dates for Helotes, TX 78023

Last spring frost March 20 · First fall frost November 13 · 238 frost-free days · USDA Zone 8b

Frost probability for 78023

Frost10%50%90%
Spring (last frost)April 11March 20February 25
Fall (first frost)October 27November 13November 30

Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (20.4 km away); the 50% date is the median year.

Month by month in Helotes

MonthWhat to do
JanuaryStart peppers and eggplant indoors 8–10 weeks before your last frost (around March 20). Start tomatoes about two weeks later, 6–8 weeks before last frost.
FebruaryStart herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable.
MarchLast frost around March 20. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings.
AprilFrost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini.
MaySuccession plant lettuce and greens. Keep beds weeded and watered consistently.
JuneHarvest regularly to encourage production. Monitor for pests and disease.
JulyMidsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall.
AugustDirect sow carrots and beets for fall harvest. Start fall broccoli and kale indoors.
SeptemberDirect sow carrots and beets for fall harvest. Start fall broccoli and kale indoors.
OctoberFirst fall frost approaching (around November 13). Transplant fall brassicas. Sow spinach, arugula, and radishes.
NovemberFirst frost around November 13. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season.
DecemberHarvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year.

What grows in a 238-day season

Frequently Asked Questions

What is the last frost date for Helotes, TX (ZIP 78023)?

The median last spring frost date for Helotes, TX (ZIP code 78023) is around March 20. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.

What is the first fall frost date in Helotes, TX?

The median first fall frost date for Helotes, TX is around November 13. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.

How long is the growing season in Helotes, TX?

The frost-free growing season in Helotes is about 238 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.

What USDA hardiness zone is Helotes, TX?

Based on frost date patterns, Helotes falls approximately in 8b. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.

When should I start tomatoes indoors in Helotes, TX?

Start tomato seeds indoors 6–8 weeks before your last frost date (around March 20). For Helotes, that's roughly January 24 to February 7. Transplant outdoors 1–2 weeks after your last frost.

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