Water
Water your fig tree when only the top inch of soil is dry. Test this by sticking your finger in the soil. Pretty soon you'll figure out about how often you need to water. Keep in mind that this may fluctuate based on seasonal humidity, etc.

Light
Keep your fiddle leaf fig in bright, indirect light. In other words, you want it to have a lot of light, but not sunbeams falling directly on it.

Food
Fertilize once a month during growing seasons, but not in winter.

Repotting or Trimming the Root Ball
When roots begin to grow out of the bottom of the pot, either re-pot into a container that's a couple inches bigger or trim the rootball, being sure not to reduce the roots by more than 20 percent. (This latter option also keeps the plant from getting too big, if that's a concern).

Propogation
Ficus tree cuttings may be started in water, but the root growth is weak, fibrous and stringy. Cuttings started this way have a difficult time acclimating to soil.

Cleaning the Leaves
Because of their large surface, fiddle leaf fig leaves tend to collect a lot of dust. To keep the plant healthy (dust can block light absorption), wipe dust off with a soft cloth.