Kari starfruit tree with dark green leaves and ripe golden yellow-orange five-ribbed fruit

Kari Carambola (Starfruit)

Averrhoa carambola 'Kari'
Categories:
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Water
Keep the root zone consistently moist but not waterlogged. Water deeply and frequently during extreme heat, especially in containers; reduce watering during cool weather. Not drought tolerant.
Description
A tropical fruit tree producing golden-yellow, sweet-tart fruit with crisp flesh and star-shaped slices. ‘Kari’ requires a sheltered, irrigated microclimate and frost protection in Phoenix Zone 9b.
Deciduous / Evergreen
Special Features
Growth Rate
Flower Color
Foliage Color
Garden Style
Toxic to pets & to kidney-impaired humans (high oxalates and caramboxin); fruit safe in moderation for healthy people
Care Instructions

Light: Morning sun with afternoon shade in Phoenix; protect from intense western exposure and reflected heat.

Water: Keep the root zone consistently moist but not waterlogged. Water deeply and frequently during extreme heat, especially in containers; reduce watering during cool weather. Not drought tolerant.

Soil: Fertile, well-drained soil rich in organic matter; slightly acidic soil is preferred. Phoenix’s alkaline soil and irrigation water can cause nutrient deficiencies.

Mature size: Typically 15–25 feet tall and 10–20 feet wide in favorable conditions; can be maintained around 8–12 feet with pruning. Container-grown trees generally remain smaller.

Bloom: Small flowers appear in repeated flushes from spring through fall under warm, favorable conditions; flowering and fruiting may be interrupted by extreme heat or cold.

Evergreen / deciduous: Evergreen in tropical conditions; may lose leaves during cold, drought, or other stress.

Growth rate: Moderate to fast with warmth, adequate moisture, and nutrition; slower under Phoenix heat, cold, or alkaline-soil stress.