How to Grow Mandarins
- 1). Plant the mandarin orange tree in well-draining, fertile soil exposed to full sunlight or at least six hours every day. The southern side of a building is usually suitable since it prevents excessive winter sun and prevents cold damage to the tree. Alternatively, plant the tree in a large clay pot filled with equal amounts of potting soil, compost and perlite.
- 2). Construct a watering ring around the garden tree to facilitate watering. Pack soil around the tree to form an 8-inch-high and 2-foot-wide ring. Add water to the ring immediately after planting so it soaks into the soil. Continue to add water to the ring every three to four days for the first two weeks before decreasing the frequency to once every seven to 10 days for the next two months. The tree is considered established when the watering ring disappears into the ground.
- 3). Spread a 2-inch-thick layer of organic mulch around the base of the tree, spaced 10 to 12 inches away from its trunk. Although not compulsory, mulching deters weeds and keeps the roots cool.
- 4). Feed the mandarin orange tree 1 cup of ammonium sulfate (21-0-0) split into three applications per year, preferably during February, mid-May and September. Scatter the fertilizer granules around the base of the tree and water thoroughly. Feed the tree 2 cups the second year and 3 the third year, using 1 cup per year of tree age.
- 5). Prune the tree to remove dead, damaged, wayward or crossing branches. Remove limbs damaged by frost in spring. Use sharp pruning shears to cut the selected wood above live growth.
- 6). Spread a tarp or blanket over the tree to protect it from frost damage. Extend the edges of the frost cover over the tree and tie it to the base with rope.
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