Singapore plumeria (Plumeria obtusa) is covered in blooms from spring to fall. The 3-inch white flowers have yellow throats and rounded petals that contrast with the plant's shiny evergreen leaves.

That’s why one of the best — Plumeria obtusa — is sometimes called Singapore plumeria, though it’s native to Colombia. Among the smaller Plumerias, the Singapore grows 6 to 15 feet tall in ...