I have a Longan fruit tree, about 10 years old, in southern California (Los Angeles) in a sunny place. It was bought from a nursery cutting, about 1. 5 feet with root. It got lots of flowers, but very few fruits every year. The tree is about 8-10 feet tall. Very green and lots of branches, about 20. What kind of fertilizer should I feed it in order to get more fruits? Please advise.
In general, longan trees bear erratically (i.e., not every year) and in some years little to no fruit is produced. However, you can try using high phosphorus fertilizer as well as enticing additional pollinators to the area.