Crotons come with a variety of leaf shapes and colors. Rule of thumb is that the more colors the plant has, the higher its light needs. This plant is known for its bad temperament when it is moved. It will drop some or all of its leaves if moved and this includes when you bring it home from the store. Too much or too little water will also make it lose leaves.
Croton likes humidity but do not do well with temperatures below 60°F, as it grows outdoors in tropical climates. Keep away from cold windows in the winter. Your plant will get its leaves back if you be patient and care for it properly. Then you may find it to be a fairly easy plant to care for. Just don’t move it around.
For plants that like humidity like Crotons, set it in a pebble filled tray with water in it.