How to Grow a Kaffir Lime Tree

About Kaffir Lime Trees

Kaffir lime (Citrus hystrix) is a citrus family member sensitive to freezing. Best grown outdoors in zones 9–10. Elsewhere, grow in containers to control conditions. Hardy once established with few problems.

Outdoor Growing (Zones 9–10)

Step 1: Full Sun Site

Requires full sun all day. Shade leads to decline and death.

Step 2: Acidic, Well-Drained Soil

Sandy soils ideal. Clay retains too much water → root rot. No organic amendment needed.

Step 3: Space for Maturity

Allow 10 ft height and equal spread. Keep clear of structures/power lines.

Step 4: Watering

Every other day for 2 weeks, then regularly but not constantly wet.

Step 5: Fertilize

High-quality citrus fertilizer twice yearly: early spring and late summer.

Container Growing (All Other Zones)

Step 1: Large Container

3× the nursery pot size. Prevents root binding (causes stunting).

Step 2: Well-Draining Mix

Use potting mix with sphagnum. Straight potting soil is too dense → root rot.

Step 3: Seasonal Movement

Outdoors in warm months; indoors in protected area when cold.

Step 4: Water and Feed

Water regularly, not flooded. Monthly water-soluble fertilizer. Set outside in rain for humidity—kaffir limes love humidity.