The Fatsia comes from the south of Japan and is mainly kept as a houseplant in Europe.
The basis of the light Fatsia keep moist while avoiding that the roots remain in the water. You will then have a chance to root rot and / or pests. In winter, add a little water, the plant is at rest.
Like many green plants Fatsia will appreciate it if you plant occasionally gives a wash cycle. Good for the health of the plant, and at the same time is, therefore, removes the dust from the leaves.