Project Features our Courtyard Planters. Classic style planter that features a return rim and a recessed base. Ideal for both indoor and outdoor use. Our Custom Composite Resin planters are made of a formulated commercial-grade fiberglass and are created at our state-of-the-art manufacturing and fabrication facility in the USA. Their dent, rust and leak proof commercial grade construction, along with a vast color and texture options, make fiberglass planters an interior and exterior landscaping favorite.