How to Care for a Lime Tree in Houston, Texas

Growing Key Limes in Houston

Key lime (Citrus aurantifolia, Mexican lime) is hardy enough for Houston with freeze protection. Glossy foliage, bright green fruit for drinks/desserts. Reaches 12 ft. Plant away from overhead obstructions and 8+ ft from structures.

Care Steps

Step 1: Site Selection

Well-draining, nutrient-rich soil. Minimum 6 hrs direct sun. South side of home preferred for cold protection.

Step 2: Soil pH

Test pH—target 6.0–8.0. Amend with ground rock sulfur (lower) or limestone (raise).

Step 3: Planting

Hole 2× container width, same depth. Amend excavated soil 1:1 with organic compost (Houston clay needs drainage help).

Step 4: Watering

• First 2 weeks: 2–3× weekly
• First growing season: deep soak when top 1 inch dry
• Established: water when weekly rain <1 inch (summer/drought)

Step 5: Fertilizing

Monthly granular high-nitrogen fertilizer spring through October. Texas soils are nitrogen-poor. Get soil analysis from local Extension office for precision.

Step 6: Mulch

Organic mulch at drip line (trunk to branch tips). Leave 6–12 inch gap from trunk to prevent disease.

Step 7: Pruning

Spring before buds. Remove dead/damaged branches and trunk suckers. Minimal pruning unless size control needed.

Step 8: Freeze Protection

Late November: build soil bank around trunk up to lower limbs. Tree can regrow from trunk if top dies. Remove carefully in early spring (tender bark).