Arkin is the most popular sweet starfruit (carambola), with crisp, juicy, star-shaped fruit on a compact tree. (Averrhoa carambola 'Arkin')
Shop this plant: Arkin Starfruit Plant Carambola 28"+ / 3 Gal
Quick Care Summary
- Sun: Full sun, at least 6-8 hours; protect from strong winds, which damage the brittle branches.
- Soil: Well-drained soil is essential.
- Watering: Water new plants 2-3 times a week for the first month, then weekly through the first year.
Sun
Full sun, at least 6-8 hours; protect from strong winds, which damage the brittle branches.
Soil
Well-drained soil is essential. South Florida's sandy and limestone soils work well if water never stands; plant on a slight mound in low areas and mix in compost at planting.
Watering
Water new plants 2-3 times a week for the first month, then weekly through the first year. Established trees need deep watering during dry spells, especially while flowering and setting fruit.
Fertilizer Schedule for South Florida
Young trees: a balanced fertilizer with minor elements (such as 6-6-6 or 8-3-9) every 6-8 weeks from March through September, starting small and increasing as the tree grows. Mature trees: 2-3 applications a year (spring, early summer, late summer). Skip fertilizer from November through February. On alkaline South Florida soil, add chelated iron and manganese if new leaves are pale with green veins. Starfruit is especially prone to iron and manganese deficiency.
Pruning
Prune lightly after harvest to shape the tree, remove dead and crossing branches, and keep it at a pickable height.
Cold Protection
Young trees are damaged below about 30°F; mature trees handle brief dips to about 27°F. Cover with frost cloth.
Container vs. In-Ground
Arkin adapts well to a 15-25 gallon container and stays manageable with pruning.
Spacing
Plant 15-20 ft from other trees and at least 10 ft from buildings.
Flowering and Fruiting Timeline
Often fruits in 1-2 years. Can flower several times a year, with main crops in late summer and winter.
Harvest
Pick when the fruit turn mostly yellow with a little green on the ribs. Fruit ripen further off the tree.
Common Pests and Diseases
Start with organic, low-impact fixes: good airflow, clean-up of fallen fruit and leaves, and soaps or oils before anything stronger. Always follow label directions.
Scale and mealybugs
How to identify: Small bumps or white cottony clusters on stems and leaf undersides, often with sticky honeydew and black sooty mold.
Organic-first treatment: Prune heavily infested twigs, spray horticultural oil or insecticidal soap, and control the ants that farm them.
Stink bugs
How to identify: Dark spots and sunken areas on fruit.
Organic-first treatment: Hand-pick, use row-cover or bags on fruit, and clean up weeds nearby.
Fruit flies
How to identify: Small punctures in ripening fruit that turn soft and rot from inside.
Organic-first treatment: Harvest on time, pick up dropped fruit daily, and bag developing fruit with mesh or paper bags.
Anthracnose and leaf spot
How to identify: Dark sunken spots on leaves and fruit, worse in rainy weather.
Organic-first treatment: Prune for airflow, clean up fallen leaves and fruit, and use copper fungicide during wet periods if needed.
FAQ
Is Arkin sweet? Yes, it is a sweet type, unlike tart varieties used for juice.
Who should avoid starfruit? People with kidney disease should not eat starfruit; ask your doctor.
Related Reading
- Starfruit (Carambola) Tree Care in Florida
- Sweet vs Tart Starfruit: Arkin, Kary and Other Varieties
- Growing Starfruit in Pots and Protecting It From Cold
Ready to grow your own? Get the Arkin Starfruit here.
