How to Grow Star Fruit Tree - Plant Care & Tips

By NorwichGardener Team   /   2024

Star fruit tree is one of the most popular tropical fruit trees. It is easy to grow and care for, and it produces an abundance of fruit. The fruit is delicious and has a wide variety of uses. The tree is also very attractive, with its glossy leaves and bright fruit.

How to Grow Star Fruit Tree - Plant Care & Tips

Popular name

  • Carambola
  • Averrhoa carambola
  • Five-angled fruit
  • Five-corner
  • Star apple

Good to Know

  • The scientific name for the star fruit tree is Averrhoa carambola.
  • It is native to Southeast Asia and the Philippines.
  • The tree can grow up to 20 feet tall.
  • The leaves are dark green and glossy.
  • The flowers are white with yellow stamens.
  • The fruit is yellow or greenish yellow, and shaped like a star.
  • Each fruit has 5 - 7 longitudinal ribs and is 10 - 12 cm long.
  • The flesh of the fruit is translucent, with a sweet-tart flavor.
  • The fruit is typically eaten fresh, but can also be used in cooking.
  • Star fruit trees are susceptible to a number of diseases, including bacterial canker and fruit rot.

Related plant:
Blue Star Juniper Tree

Planting Process

  1. For star fruit tree, first step is to find a location that gets full sun and has well-drained soil.
  2. Then, dig a hole that is twice the width and depth of the tree’s root ball.
  3. Next, place the tree in the hole and backfill with soil.
  4. After that, water the tree deeply.
  5. Mulch around the tree, but not touching the trunk.
  6. Fertilize the tree every 6-8 weeks during the growing season.
  7. Prune the tree as needed to encourage growth and shape.
  8. Watch for pests and diseases and treat as needed.
  9. Harvest the star fruit when they are ripe and enjoy!
  10. Repeat steps 1-9 every year to maintain your tree.

Related plant:
Stardew Valley Trees

The Soil

About soil condition, star fruit trees like well-drained soil that's high in organic matter. The tree's roots are surface-rooting, so they don't do well in waterlogged or poorly drained soils. The tree is also somewhat salt-sensitive, so it's best to avoid planting it in areas with high concentrations of salt in the soil.

Light requirement

Not too different with other fruit trees, star fruit trees need a lot of sun to produce fruit. They should be planted in an area that gets at least six hours of direct sunlight each day. In areas with hot summers, it's best to plant them in a spot that gets some afternoon shade to prevent the leaves from getting scorched.

Ideal Temperature

The temperature condition that is best for a star fruit tree is one that is warm and humid. The tree does not do well in cold or dry conditions. The ideal temperature range for the tree is between 70 and 85 degrees Fahrenheit.

Ideal Humidity

Ideal humidity condition for this plant is between 60-70%. However, it can grow in a range of 50-80%. Too much humidity will lead to fungal growth on the plant. This plant also prefers a warm temperature.

The Fertilizer

For the fertilizer, this family of plant requires a lot of nitrogen, phosphorus and potassium or what is also called NPK. The tree will also need a good amount of magnesium, sulfur, and calcium. You can use any kind of fertilizer as long as it has a good amount of these ingredients. However, it is important to note that too much nitrogen in the soil can actually kill the tree. As for the roots, they are very sensitive to disturbance and should not be disturbed if possible.

About light

Pruning a star fruit tree is important to maintain its shape and size. To prune a star fruit tree, first, identify the branches that need to be removed. Second, using a sharp pruning tool, cut the branches at a 45-degree angle. Finally, dispose of the branches properly.

The Propagation

Propagation of star fruit trees is typically done through grafting or rooting of cuttings. Grafting is done by taking a cutting from a mature tree and attaching it to the rootstock of a young tree. This method is often used to create trees that produce fruit more quickly than those grown from seed. Rooting of cuttings is done by taking a cutting from a mature tree and planting it in soil. The cutting will develop roots and can be transplanted to a new location. This method is often used to create clones of a particular tree.

Growth Rate

Usually, the plant growth rate is incredibly fast, with some species having the potential to grow up to four feet in a single growing season. The average growth rate for a star fruit tree is between two and three feet per year. When planting a new tree, be sure to select a location that will allow for plenty of room to grow. Star fruit trees need full sun and well-drained soil to thrive.

Common Problems

Common problems for this kind of plant are nutrient deficiencies and pests. The leaves of the tree may turn yellow due to a lack of nitrogen and the fruit may be small and stunted if the tree is lacking phosphorus. Pests such as aphids, scale, and mealybugs can also infest the tree and cause damage.

Growing Tips

  • Do not forget to water your star fruit tree regularly. Without enough water, the leaves will droop and the fruit will not develop properly.
  • Fertilize your star fruit tree every two weeks with a high-quality fertilizer. This will help the tree to produce more fruit.
  • Prune your star fruit tree regularly. This will help to keep the tree healthy and promote new growth.
  • Place your star fruit tree in an area that receives full sun. The tree needs at least six hours of direct sunlight each day.
  • Keep the area around your star fruit tree free of weeds. Weeds can compete with the tree for nutrients and water.
  • When the fruit begins to ripen, pick it regularly. This will encourage the tree to produce more fruit.
  • Store the ripe fruit in a cool, dry place. The fruit will last longer if it is not exposed to excessive heat or direct sunlight.

Similar Plants

  • Star apple tree
  • Star gooseberry tree
  • Star jasmine tree
  • Star nut tree
  • Star anise tree
  • Star Chestnut tree
  • Star fruit Magnolia tree
  • Star of India tree
  • Star rosemary tree
  • Star tulip tree

Source:
Fruit Trees | OSU Extension Service
Types of Fruit Trees - Cooperative Extension: Tree Fruits
WSU Tree Fruit | Washington State University

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Reviewed & Published by Richelle
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Trees Category