Lime trees can accent a garden with color, fresh citrus scent and shade, but grow most easily in tropical or subtropical climates. However, if you wish to grow a lime tree and you live in a location that has cold winters, you can still do so with a little extra work. Keep in mind that if you live in a cooler climate, you will need to keep your lime tree in a planter so you can move it inside for winter.
Pick a place for the lime tree to sit in the direct sun during warm seasons, getting on average about 8 hours of sun per day.
Water regularly, about three times a week. You don't want the soil to get soggy, but it should be continuously moist. If you don't water it enough, you will know because the lime tree will begin to drop its leaves. If you water it too much, the leaves will begin to yellow.
Fertilize the lime tree every two months because they are heavy feeders. Use a rich nitrogen fertilizer, compost and mulch, making sure to spread it around evenly around the lime tree's base.
Keep the lime tree warm. If temperatures drop below 50 degrees Fahrenheit, the lime tree will die. In cooler months, bring the lime tree inside to stay warm and place it in a sunny window. Decrease the amount of water you supply to it accordingly, as it will not need much being inside out of straight heat. This also will mean that it needs about 8 to 10 hours of sun a day in the window.
Prune occasionally with shears when you see dead, diseased or broken branches on the tree.