No, Plumeria flowers do not require pollination to produce blooms. Plumeria is capable of producing flowers without undergoing fertilization and seed formation. However, pollination is necessary for the formation of seeds and subsequent seed pods. In the absence of pollination, Plumeria flowers will still bloom and produce their characteristic beautiful and fragrant flowers, but they will not develop into seed pods. Some gardeners prefer to remove spent flowers to encourage the plant to redirect energy into producing new blooms rather than seeds.