Texas gardeners plant jicama in late spring, ensuring at least five months of warm weather for tuber development. The best time to plant jicama in texas is after the last frost date, when soil temperatures consistently stay above 65°F. This timing gives the long-season crop enough heat to produce those crisp, sweet tubers you love in salads and stir-fries.
Jicama needs patience. It takes 150 to 180 days from planting to harvest. In Texas, that means you need to start right when the danger of frost is gone and the ground is warm. Let’s break down exactly when and how to plant jicama across different Texas regions.
Understanding Texas Growing Zones For Jicama
Texas spans USDA hardiness zones 6 through 9. Your specific zone affects your planting calendar. Northern Texas (zones 6-7) has shorter warm seasons. Southern Texas (zones 8-9) enjoys longer, hotter summers.
Jicama is a tropical plant native to Mexico. It thrives in heat and hates cold. Even a light frost will kill the vines and ruin the tubers. So your planting window depends entirely on your local frost dates.
Last Frost Dates By Texas Region
- North Texas (Dallas, Fort Worth): Last frost around March 15-30
- Central Texas (Austin, San Antonio): Last frost around March 1-15
- South Texas (Houston, Corpus Christi): Last frost around February 15-28
- West Texas (El Paso, Lubbock): Last frost around April 1-15
- East Texas (Tyler, Longview): Last frost around March 15-30
You want to plant jicama seeds or transplants about two weeks after your last frost date. This ensures the soil has warmed up sufficiently.
Best Time To Plant Jicama In Texas
The ideal planting window for jicama in Texas is from mid-April to early June. This gives the plants the full five months of warm weather they need. For most of the state, late April is the sweet spot.
If you plant too early, cold soil can cause seeds to rot. If you plant too late, the tubers won’t have enough time to mature before the first fall frost. First frost in Texas typically occurs between October 15 and November 15, depending on your location.
Soil Temperature Requirements
Jicama seeds need soil temperatures above 65°F to germinate. The ideal range is 70-85°F. Use a soil thermometer to check before planting. Cold, wet soil is the number one reason jicama seeds fail.
You can warm the soil faster by using black plastic mulch or raised beds. This is especially helpful in northern Texas where springs are cooler.
How To Plant Jicama In Texas
Follow these steps for a successful jicama crop. Start with healthy seeds or transplants from a reliable source.
Step 1: Choose The Right Location
Jicama needs full sun, at least 6-8 hours daily. It also needs well-draining soil. Sandy loam is ideal. Heavy clay soil can cause tubers to rot. If your soil is clay, plant in raised beds or containers.
The soil pH should be between 6.0 and 7.5. Test your soil and amend if needed. Add compost to improve drainage and fertility.
Step 2: Prepare The Planting Area
- Remove all weeds and grass from the planting bed
- Loosen the soil to a depth of 12 inches
- Mix in 2-3 inches of aged compost or well-rotted manure
- Add a balanced fertilizer like 10-10-10 according to package directions
- Rake the bed smooth and water it well
Step 3: Plant Seeds Or Transplants
For seeds: Sow them 1/2 inch deep and 4-6 inches apart. Cover lightly with soil and water gently. Seeds germinate in 7-14 days. Thin seedlings to 12-18 inches apart once they have two true leaves.
For transplants: Set them 12-18 inches apart in rows spaced 3-4 feet apart. Water thoroughly after planting. Transplants give you a head start, which is useful in northern Texas.
Step 4: Provide Support
Jicama vines can grow 10-15 feet long. They need a trellis, fence, or sturdy poles to climb. Install supports at planting time to avoid disturbing roots later. A simple trellis made of T-posts and wire mesh works well.
Growing jicama vertically saves space and improves air circulation. This reduces disease problems.
Caring For Jicama During The Growing Season
Jicama is not a fussy plant, but it does need consistent care. Here’s what to focus on.
Watering
Jicama needs regular moisture, especially during flowering and tuber formation. Water deeply once or twice a week, depending on rainfall. Aim for 1-2 inches of water per week. Drip irrigation is best because it keeps leaves dry and prevents fungal diseases.
Reduce watering as harvest approaches. This helps the tubers firm up and store better.
Fertilizing
Jicama is a light feeder. Too much nitrogen produces lush vines but small tubers. Use a low-nitrogen fertilizer like 5-10-10 at planting time. Side-dress with the same fertilizer once a month during the growing season.
You can also use compost tea or fish emulsion for a gentle nutrient boost. Avoid high-nitrogen synthetic fertilizers.
Weed Control
Keep the planting bed weed-free, especially when plants are young. Weeds compete for water and nutrients. Mulch with straw or wood chips to suppress weeds and retain moisture.
Be careful not to disturb the shallow roots when weeding. Hand-pull weeds close to the jicama plants.
Pest And Disease Management
Jicama has few serious pests in Texas. Aphids and spider mites can appear during hot, dry weather. Spray them off with a strong stream of water or use insecticidal soap.
Root-knot nematodes can be a problem in sandy soils. Rotate crops and plant marigolds as a natural deterrent. Fungal diseases like powdery mildew can occur in humid conditions. Provide good air circulation and avoid overhead watering.
Harvesting Jicama In Texas
Jicama is ready to harvest 150-180 days after planting. The tubers should be 4-6 inches in diameter. You can check by gently brushing away soil from the top of the tuber.
Harvest before the first fall frost. Cold temperatures damage the tubers and ruin their flavor. In Texas, that means harvesting from late September through November.
How To Harvest
- Cut the vines back to about 6 inches above the soil
- Use a garden fork to loosen the soil around the plant
- Gently lift the tubers out of the ground
- Brush off excess soil, but do not wash them
- Let the tubers cure in a warm, shady spot for a few days
Curing toughens the skin and improves storage life. After curing, store jicama in a cool, dry place. They keep for 2-3 months at 50-60°F.
Regional Planting Tips For Texas
Different parts of Texas have unique challenges. Here are specific tips for each region.
North Texas (Zones 6-7)
Your growing season is shorter. Start seeds indoors 4-6 weeks before the last frost. Transplant outdoors in late April or early May. Use black plastic mulch to warm the soil. Choose early-maturing jicama varieties if available.
Central Texas (Zone 8)
You have a good long season. Plant from mid-April to mid-May. Watch for hot, dry spells in July and August. Mulch heavily to conserve moisture. You can also plant a second crop in late May for a fall harvest.
South Texas (Zone 9)
Your warm season is long and hot. Plant from early April to early June. You can even plant in late summer for a winter harvest in mild years. Protect plants from extreme heat with shade cloth during heat waves.
West Texas (Zone 6-7)
Your climate is dry and cool. Plant in late April or early May. Use drip irrigation to conserve water. Raised beds help with drainage. Be prepared to cover plants if a late frost threatens.
East Texas (Zone 8)
Your humid climate can lead to fungal issues. Space plants wider for air circulation. Plant in well-draining soil or raised beds. Water in the morning so leaves dry quickly.
Common Jicama Growing Problems In Texas
Even with good planning, issues can arise. Here are solutions to common problems.
Poor Germination
Seeds rot in cold, wet soil. Wait until soil is above 65°F. Plant in well-draining soil. Soak seeds for 24 hours before planting to speed germination.
Small Tubers
This usually means the growing season was too short. Plant earlier or choose a faster-maturing variety. Too much nitrogen also causes small tubers. Use low-nitrogen fertilizer.
Bitter Taste
Bitter jicama is often caused by stress. Inconsistent watering, extreme heat, or pest damage can cause bitterness. Keep plants evenly watered and healthy.
Vines But No Tubers
This happens when plants get too much nitrogen or not enough sun. Ensure full sun and use a low-nitrogen fertilizer. Also check that you have enough growing time left.
Best Jicama Varieties For Texas
Choose varieties that perform well in warm climates. Here are some reliable options.
- San Juan: A popular variety with good heat tolerance
- Agua Dulce: Known for sweet, crisp tubers
- La Vega: A traditional Mexican variety that does well in Texas
- Early White: Matures a bit faster, good for northern areas
Look for seeds at local nurseries or online retailers. Some varieties may be labeled as “yam bean” or “Mexican potato.”
Frequently Asked Questions
Can I Plant Jicama In Containers In Texas?
Yes, jicama grows well in large containers. Use a pot at least 18 inches deep and wide. Provide a trellis for the vines. Container plants need more frequent watering.
What Happens If I Plant Jicama Too Early In Texas?
Planting too early in cold soil causes seeds to rot or germinate poorly. Young plants may be stunted. Wait until soil temperature is above 65°F.
How Do I Know When Jicama Tubers Are Ready To Harvest?
Check the size. Tubers are ready when they reach 4-6 inches in diameter. The skin should be smooth and tan. You can also count days from planting; aim for 150-180 days.
Can I Grow Jicama Year-round In South Texas?
Not exactly. Jicama needs a frost-free period of at least five months. In South Texas, you can plant in early spring and again in late summer for a fall harvest. But winter temperatures are too cool for continuous growth.
Do I Need To Prune Jicama Vines?
Pruning is not necessary. Let the vines grow naturally. If they get too long, you can trim them back slightly. But leave enough leaves for photosynthesis.
Final Thoughts On Planting Jicama In Texas
Jicama is a rewarding crop for Texas gardeners. The key is timing. Plant after the last frost when soil is warm. Give the plants full sun, consistent water, and a long growing season. With proper care, you’ll harvest sweet, crunchy tubers that taste nothing like store-bought.
Start planning now. Check your local frost dates. Prepare your soil and supports. Then plant at the right time for your region. Your patience will be rewarded with a bountiful harvest of fresh jicama.
Remember, the best time to plant jicama in texas is late spring, but your exact date depends on where you live. Use the guidelines here to find your perfect planting window. Happy growing.