Its height is 25 to 30 feet in height and almost the same length. Early fruit drop is a sign of stress. Magnolia stellata, sometimes called the star magnolia, is a slow-growing shrub or small tree native to Japan.It bears large, showy white or pink flowers in early spring, before its leaves open. Trees flower several times a year. Native to Southeast Asia, Starfruit has a delicious tangy taste and a star shape when sliced. Arranged alternately on branches with 5-12 leaflets Flowers Tiny rose colored, fragrant. Also too much wind can stress out starfruit trees. Many people get frustrated when the fruit trees they plant in their gardens seem to take forever to bear fruit. Star fruit tree likes Rich loamy soil with a pH level of 5.5 to 6.5. full sun and well-drained soil are better, you should protect from the high wind. The sides are deeply ridged forming a star shape. The star fruit ripens on the tree, not after harvest. The fruit from this subtropical tree has not only a delicious tangy flavor reminiscent of an apple, grape, and citrus combination, but is truly star shaped and, thus, unique among its exotic tropical fruit brethren. Growing Star fruit tree Location and soil. The flowers of fruit trees are very sensitive to late spring frosts. The star fruit tree (Averrhoa carambola), also called the carambola, makes a distinctive focal point in a yard with its attractive flowers and distinct star-shaped fruit. I have an orange tree planted 5 years ago it makes lots of flowers and buds but all fall not even one fruit stays on the tree. Once the flower buds begin to swell and develop there is a risk of frost damage. Watering. Season June through February. Pruning to maintain tree at about 8-10 ft Leaves Evergreen, compound 6-12 in. But stress can be caused by a lot of things, like not enough water or fert. But if you live in a cold climate learn How to Grow a Carambola (Star Fruit) Tree in containers. A: In the first year, star fruit trees typically don’t produce much if any fruit. Q: How long does it take for a star fruit tree to bear fruit? Fruit Yellow with waxy appearance. I would also reduce or discontinue pruning until it starts fruiting normally. In addition, maintaining a smaller tree facilitates tree care and fruit harvest, makes it easier to spray the tree, and greatly reduces possible storm damage. Unlike vegetables, it can take years for a fruit tree to become established enough to produce flowers, let alone set fruit, and it can take even longer for the tree to support the heavy crop we dream of. Starfruit tree care, as you may have guessed, requires warm temperatures. The frost does not have to occur during full bloom for the damage to occur. Pruning to Produce Off-Season Fruit. The tree produces small lilac or purple flowers and The waxy fruit is orange-yellow in color, 7.5–12.5 cm (3.0–4.9 in) in length, oval and deeply ribbed. But as other already said it might just be a case of tree being too young and aborting the fruits. This fruit is beared by the Carambola tree which features oval shape leaflets and purple flowers . Regularly give water to starfruit from bloom to harvest. Source: naokomc. Temperatures much below 29 degrees F will prevent fruit formation. After you care for it through its first year, you can expect fruit in either year 2 or 3. The Carambola tree has a lifespan of 40 years and reaches a height of 7–10 m (22–33 ft), spreading 6–7.6 m (20–25 ft) in diameter. Do not remove lower tree branches. Carambola trees are unique in that once a shoot and limb develop the ability to flower, they can flower repeatedly. "i planted fruit trees 7 years ago but they hardly make fruit I fertilize them and water them once a week in hot summer days but it is useless what shall I do .