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Fertilize your tree with 200g of ammonium sulfate fertilizer a month after you plant it and a month before the rainy season. Once the tree starts to bear fruit, you'll want to change the fertilizer you're using to a complete 14-14-14 fertilizer so that you can provide the tree with additional phosphorus and potassium. At the peak of fruiting, 2 kgs of 14-14-14 fertilizer should be applied annually. If you are growing your trees outside and there is regular rainfall, you won't need to water them regularly. If you're growing them inside or there is a dry period, however, you should use a watering can to water the plants every day. Keep the soil moist, but not overly wet. You can test this by poking your finger deep into the soil. If it's dry an inch under the surface, it's well watered. Once your tree grows to 1.5 meters (4.92 feet), cut off the top .5 meters (1.64 feet) of the tree. Your tree should be about a meter tall. This will promote the growth of your tree's branches and fruit. Remove dead or dying branches from your lanzone tree. You should also prune off clusters of flowers to promote the growth of the fruit. Harvest the fruit early in the day or later in the evening when the sun is not hot. Cut the fruit stalk with shears or a sharp knife. Do not detach the fruit's branch where it connects to the tree, or it won't be able to grow fruit on that branch in the future.
Fertilize your tree twice a year. Water the trees enough to keep the soil moist. Prune your lanzone tree. Harvest the fruit 140-150 days from flower formation.