Plant tomato seeds in the ground, water them every day, and harvest them when they are ripe. The number of watering will affect the harvest. Pouring water twice can produce the most tomatoes, and then you can harvest them in a few days. After harvesting, continue to cultivate and continue to harvest.
The fruit produced by the fruit trees on the island belongs to the specialty of the island where the player is located. The specialty fruit can only be sold for 100 bell coins on its own island, but it can be sold for 500 bell coins when going to other player islands that are not specialty products.