No matter which variety you choose, limes, like other citrus, prefer a warm environment. Unless you live in the tropics, your best bet when growing limes at home is to keep them indoors. Choose dwarf varieties and place them in a south-facing window for best results. If a south-facing window is unavailable, supplement lower-light areas with ultraviolet grow lights. Be prepared to provide extra humidity in the winter when the air is very dry.
Mix potting soil and compost in a 1:1 ratio in a large container. Choose a container that is twice the size of the root ball of your dwarf lime tree sapling.
Plant the lime tree sapling in the container full of potting soil and compost. Cover the roots completely with this mixture. Choose any dwarf variety of lime you prefer, but avoid full-sized lime trees. Place the container in a window that gets full sun for at least six to 12 hours a day.
Insert a moisture meter into the soil near the base of the tree. Water only when the meter indicates that the tree needs watering.
Pollinate by hand using a small round-headed paintbrush when flowers have opened. Brush the tip lightly over the pollen, then swirl it around inside the bottom of each flower.
Use a humidifier to keep the plant moist during the winter. Mist foliage with a spray bottle. Lime foliage enjoys being moist.
Apply a good citrus fertilizer regularly. Follow package instructions, which vary by manufacturer.
Transplant the lime tree to a bigger container every two years. Avoid allowing your tree to become root-bound, as this invites poor health, root rot and disease.