Although fig trees are native to Asia, they have grown readily in the Mediterranean for more than 5,000 years, according to Purdue University. They are related to tropical and subtropical ficus trees. Edible figs can be grown in home gardens, either in the ground or in containers. Figs can handle temperatures down to 10 degrees F for short periods of time, but they prefer warm, temperate regions for the best fruit development. No matter where you grow your fig tree, it needs plenty of water to develop good fruit.
Dig a 2- to 3-inch deep moat around the base of the fig tree, about 5 to 6 feet in diameter. Pile the soil into a trench around the edges of the moat to keep the water in. This will help get the water to the fig tree's roots.
Water 1-year-old fig trees with 10 gallons of water three times a week until the trees are established, according to the University of Florida.
Water established fig trees with 20 to 50 gallons of water several times a week only during drought conditions.
Place the hose at the rim of the trench and fill it with water. Allow the water to soak into the ground before you add more water.
Water fig trees in containers when the top 3 to 4 inches of soil is dry. Place the hose or watering can on the side of the container and fill it with water until it runs out of the bottom.