Pat down the soil again and then dig a water basin. Though orange trees don’t like to sit in water, they do like a lot of water. A water basin that holds about 7 to 10 gallons of water (26.5 to 37.85 L) will ensure that the orange tree gets all the water it needs. Once the basin is ready, fill it with water. If properly planted and cared for, the tree will start bearing three to four years after planting.