When to Plant Turnips in Houston, TX
Published: April 24, 2026
Turnip Planting Dates for Houston, TX
| Start seeds indoors | Year-round |
| Last frost (average) | January 30 |
| Direct sow outdoors | January 9–19 |
| Minimum soil temperature | 40°F |
| Expect first harvest | February 13 – March 10 |
| Fall crop planting | October 20–30 |
| Fall crop harvest | November 24 |
| First fall frost (average) | December 15 |
⚠ Direct sow turnips 2–4 weeks before last frost for spring crop. Best planted in late summer (6–8 weeks before first fall frost) for fall harvest — frost sweetens the roots. Fast-growing: some varieties ready in just 35 days.
Best Turnip Varieties for Houston, TX
Consult a Houston-area nursery or your state extension office for turnip varieties proven in Zone 9a.
Growing Turnips in Houston
Houston sits in Zone 9a, with an average last frost of January 30 and first fall frost around December 15 — giving a 319-day frost-free growing season. Cool-season crops like turnip benefit from Houston'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 Houston's warm climate, turnip 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 Houston, not April through June.
Houston's heavy clay soil benefits from raised beds or deep organic matter amendment before planting turnip. 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.
Turnip Calendar for Houston
| Month | Task |
|---|---|
| Year | Start seeds indoors under grow lights |
| January | 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 |
Turnip Tips for Houston Gardeners
- •Thin seedlings to 4-inch spacing when plants are 3 inches tall — crowded turnips produce small woody roots.
- •Both roots AND greens are edible — harvest baby turnip greens 4 weeks after sowing, roots 5–9 weeks.
- •Plant cool-season turnip in Houston during October through February — spring plantings bolt before producing a usable crop in warm zones.
Common Turnip Pests in Houston
- •Flea Beetle — peaks June–August in Zone 9a (active March–October); tiny black beetles that riddle leaves with holes; row covers protect seedlings.
- •Aphid — peaks June–August in Zone 9a (active March–October); monitor closely during peak season and treat early.
- •Cabbage Root Maggot — peaks June–August in Zone 9a (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 Turnips in Houston
In Houston's warm climate, Pea and Mint are the most beneficial plants to grow alongside turnip. Pea improves nearby plant health and pest resistance. Keep turnip away from Potato — it competes for nutrients and shares blight diseases. Warm-climate gardeners especially benefit from dense, layered companion plantings that shade soil and reduce water loss.
Frequently Asked Questions
When should I plant turnip in Houston, TX?
In Houston (Zone 9a), direct sow turnip around January 9–19. Soil must be at 40°F or warmer at 2-inch depth before sowing — cold soil rots the seeds.
What zone is Houston, TX for turnip growing?
Houston is USDA Zone 9a. For turnip, this means a frost-free growing season of roughly 46 weeks running from January 30 to December 15. Cool-season crops like turnip thrive in this zone with both spring and fall planting windows available.
When is turnip harvest season in Houston?
Expect the first turnip harvest in Houston around February 13, with harvest continuing through March 10. This is based on 35–60 days from transplant or direct sow. A fall crop planted October 20–30 adds a second harvest around November 24.
How long does it take to grow turnip in Houston, TX?
From transplant or direct sow to first harvest, turnip takes 35–60 days in Houston's climate. Based on a typical planting date of January 9–19, expect your first harvest around February 13. Houston's warm Zone 9a climate tends toward the faster end of this range — warmer soil and longer days accelerate maturity.
What soil does turnip need in Houston?
Houston's heavy clay soil compacts easily and drains slowly — problematic for turnip 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.