Dig a hole that is considerably deeper and wider than the size of its root ball if you are planting a dwarf fig tree outdoors. For inside planting, select a container that will amply hold the root ball. Ensure that the soil is loose and rich, not heavy or clay-like. Add compost or humus to keep the moist, loose consistency.
Inspect the root ball of the dwarf fig tree. Remove any dried-out roots or any broken roots. Then gently place the tree in either the hole or the container and crumble the soil all around it to ensure it is loose. Tap the soil to remove any air pockets. Water the soil thoroughly, and then add much to keep the soil moist.
Water the dwarf fig tree, but not too much. Because its root system is close to the top of the ground, it tends to dry out more quickly than other plants. If the leaves are wilted in the heat of the afternoon, it needs water. Be careful not to overwater, however, since too much water or poor drainage will have a detrimental effect on the plant's root growth.
Add 20-20-20 fertilizer only in the spring of the year. Although dwarf fig trees will fertilize themselves, harvests are often higher when two are placed side by side. Pruning is needed only in the first three years, and attention should be given to the center branches to allow sunlight to pour through the tree. Prune in the spring just as the tree is coming out of dormancy.