Plant Shock

When summer time is over and it's time to start bringing in plants,
they'll tend to drop their leaves. This is actually normal.
As long as you water them as needed, and provide good lighting
the leaves will grow back and the plant will start to come alive
again. Plants can also go into shock when you first purchase and
bring home a new plant.This does not mean it's dieing,
just give it some time. Plants that tend to drop most of it's
leaves are Ficus, and dwarf trees. Dwarf Trees or Shrubs needs
to be kept moist and never dry between watering, don't soak them
to death either.