Based on my discussions with professional and seasoned longan farmers, there are several steps to take care of longan trees.
After transplanted longan trees are moved to pots or your garden, the next step is the daily care including watering, fertilization, lighting, and stem pruning if the trees are old enough to start bearing fruits.
Don’t forget to change your planting medium once a year to keep your longan trees productive by getting new nutrients from new medium. Planting medium change is a mix of old and new with 2 to 1 ratio.
Fruiting Diamond River Longan Tree
Newly planted seeds need a lot of water to germinate. Water is also important for photosynthesis and natural solvent for nutrients in soil. With those reasons, you can see why watering is important to do twice daily, in the morning and the evening. Pay attention to how much water you give your longan trees. 3-4 water dippers is enough for one tree. Never over-water until you can see water puddle inside the pot.
Harrowing is also something to do for you in order to keep your soil loose as to prevent the stalling of root, stem, and leaf growth. Over-watering can make your planting medium too dense. Harrowing can be done using small hoes. You can also do your weeding during harrowing. Make sure to get rid of parasitical plants around like epiphyte. Be careful not to damage the roots when you harrow.
Another important step is to prune unproductive branches or branches that cover the canopy to make sure sunlight reaches all organs. The right and precise ration for pruning is using the 1:3:9 template.
To get your longan trees to bear fruit, stimulate flowering by tying the stem tightly around one meter over the soil. Tie around the stem 2-3 times using steel wire. Usually, longan trees bear fruit around July-October each year. Fruits are ripe five months after flowers bloom.