Orange trees are subtropical citrus plants that thrive in USDA hardiness zones 9 to 11. When planting an orange tree, a tree well with at least a 3-foot diameter is highly recommended for optimal watering. While some gardeners are fine with this area of plain dirt, many gardeners prefer to fill the well with other plants, such as flowers or herbs. In order to best care for both types of plants, special measures must be taken.
Water your plants and tree using a deep watering technique. Begin in the morning by filling the entire tree well with water. Let the water sink into the ground and then repeat. Deep water the bed every four days, or whenever the well dries out to 2 inches below the soil line.
Fertilize the plants and tree using organic fertilizers to avoid unwanted chemical reactions in either the plants or the tree. For optimal fertilizing combine 2 tbsp. fish emulsion fertilizer, 1 tsp. powdered seaweed, 1 tbsp. Epsom salts, 2 tbsp. apple cider vinegar, 2 tbsp. molasses, 6 tbsp. coffee grounds in 3 cups of hot water. Pour this mixture into the tree well and onto the foliage of the plants. Water the fertilizer into the soil using deep watering and repeat this fertilization monthly from February through November.
Weed your tree bed weekly. This ensures that no other plants compete for water and nutrients with the tree and plants in the bed.