If you live near the coast, you may have noticed that corrosion of materials occurs at a much faster rate than any other area. This happens because of the corrosive salt air near the shore.
Fiberglass is one of the top corrosion resistant materials, easy to shape and can be as strong as metal. If you live in a coastal area, like Florida, you should to be wise in what kind of material you choose for your decoration.
General advantages of fiberglass for your planters over other materials are:
Immune to corrosion and rust.
Unnafected by sunlight.
Does not rot.
Considering the list above, it is no surprise that boats are made of fiberglass because with proper care it can last for decades!