When to Plant Peas in San Antonio, TX
Published: April 24, 2026
Pea Planting Dates for San Antonio, TX
| Start seeds indoors | Year-round |
| Last frost (average) | February 1 |
| Direct sow outdoors | December 28–January 7 |
| Minimum soil temperature | 40°F |
| Expect first harvest | February 21 – March 8 |
| Fall crop planting | October 6–16 |
| Fall crop harvest | November 30 |
| First fall frost (average) | December 15 |
⚠ Plant peas 4–6 weeks before last frost — one of the first vegetables of spring. Tolerate light frost. Also plant in late summer for a fall harvest.
Best Pea Varieties for San Antonio, TX
Consult a San Antonio-area nursery or your state extension office for pea varieties proven in Zone 8b.
Growing Peas in San Antonio
San Antonio sits in Zone 8b, with an average last frost of February 1 and first fall frost around December 15 — giving a 317-day frost-free growing season. Cool-season crops like pea benefit from San Antonio's cooler spring and fall windows, when temperatures stay in the 55–75°F sweet spot that produces the best flavor and least bolting.
In San Antonio's warm climate, pea works best as a fall, winter, and early-spring crop. Summer heat bolts most cool-season vegetables before they can produce a harvestable head or root. Plan primary plantings in October through February in San Antonio, not April through June.
San Antonio's heavy clay soil benefits from raised beds or deep organic matter amendment before planting pea. Clay retains moisture well but compacts easily — add 3 to 4 inches of compost and work it in to 12 inches before planting. Consistent watering (1 inches per week) is especially important in clay soil, which can crack and pull away from roots during dry spells; mulch around plants to stabilize moisture.
Pea Calendar for San Antonio
| Month | Task |
|---|---|
| Year | Start seeds indoors under grow lights |
| February | Last frost — soil warming, prepare bed |
| December | Direct sow seeds into warm soil |
| February | Expect first harvest window to open |
| October | Start fall crop — transplants or direct sow |
| December | First fall frost — harvest remaining, end of outdoor season |
Pea Tips for San Antonio Gardeners
- •Soak pea seeds overnight before planting to speed germination in cool soil.
- •Install a 4–6 foot trellis at planting time — peas climb from day one and produce more per square foot when supported.
- •Plant cool-season pea in San Antonio during October through February — spring plantings bolt before producing a usable crop in warm zones.
Common Pea Pests in San Antonio
- •Pea Aphid — peaks June–August in Zone 8b (active March–October); monitor closely during peak season and treat early.
- •Powdery Mildew — peaks June–August in Zone 8b (active March–October); white powdery coating on leaves; improve airflow and apply milk spray (1:9 milk-to-water).
- •Root Rot — peaks June–August in Zone 8b (active March–October); monitor closely during peak season and treat early.
Check plants every 2–3 days during peak season — early intervention prevents most infestations from becoming serious.
What to Plant with Peas in San Antonio
In San Antonio's warm climate, Carrot and Radish are the most beneficial plants to grow alongside pea. Carrot shares root-zone space without competing because carrot roots run deeper than most companions. Keep pea away from Onion — it inhibits bean and pea growth through sulfur-compound allelopathy. Warm-climate gardeners especially benefit from dense, layered companion plantings that shade soil and reduce water loss.
Frequently Asked Questions
When should I plant pea in San Antonio, TX?
In San Antonio (Zone 8b), direct sow pea around December 28–January 7. Soil must be at 40°F or warmer at 2-inch depth before sowing — cold soil rots the seeds.
What zone is San Antonio, TX for pea growing?
San Antonio is USDA Zone 8b. For pea, this means a frost-free growing season of roughly 45 weeks running from February 1 to December 15. Cool-season crops like pea thrive in this zone with both spring and fall planting windows available.
When is pea harvest season in San Antonio?
Expect the first pea harvest in San Antonio around February 21, with harvest continuing through March 8. This is based on 55–70 days from transplant or direct sow. A fall crop planted October 6–16 adds a second harvest around November 30.
How long does it take to grow pea in San Antonio, TX?
From transplant or direct sow to first harvest, pea takes 55–70 days in San Antonio's climate. Based on a typical planting date of December 28–January 7, expect your first harvest around February 21. San Antonio's warm Zone 8b climate tends toward the faster end of this range — warmer soil and longer days accelerate maturity.
What soil does pea need in San Antonio?
San Antonio's heavy clay soil compacts easily and drains slowly — problematic for pea which needs oxygenated roots. Build a raised bed or amend deeply with 3–4 inches of compost worked into the top 12 inches. Add gypsum if the soil is severely compacted. Consistent watering matters especially in clay because the soil can crack and pull away from roots during dry spells.