A Fatsia plant, also called a Fatsia japonica, or Japanese aralia, originated in the sub-tropic forests of Japan, Korea, & Taiwan. Fatsia plants are a type of evergreen that can be grown both indoors and outdoors in frost-free areas. A Fatsia plant has shiny, leathery, medium green palmate (hand-shaped) leaves that grow at the ends of stiff stems. Fatsia japonica is a compact, upright plant that, even when grown as a houseplant, can reach 6ft in height. Prune a Fatsia japonica aggressively to keep the growth under control and the shape attractive. Watch out for powdery mildew when the humidity is high.
Your Fatsia would love it. Be sure to keep it in the shade and move it back indoors before temperatures go below freezing.
Fatsias are prone to spider mites which produce the webbing you see, especially when the air is very dry. Spray all parts of the plant with the green solution and try to increase the humidity in the room.
No it won’t. Fatsias need to be aggressively trimmed in the spring to keep them full, shapely, and upright.
Once fatsia leaves badly droop it’s very hard to get them back to their original position. You may have to get a small stake and tie them up. Eventually, the leaves may stay in the upright position on their own.
I, personally, don’t recommend misting. Keeping the leaves wet encourages a disease called powdery mildew, which is just one more problem you’ll have to deal with. I’d suggest putting a small humidifier near your plant or sitting it on a bed of wet gravel. Be sure the Fatsia is sitting on the rocks not in the water.