The Navigator pear tree is a deciduous ornamental tree with white flowers in the spring and yellow-orange leaves in the fall. It's a good choice for shade or as a specimen tree in a yard or park.hape: Dense, pyramidal, and uprightLeaves: Glossy, dark green, and heart-shapedFlowers: White, showy, and in clustersFruit: Small and rarely producedHeight: Can grow up to 35 ftSpread: Can spread up to 18 ftSunlight: Full sunHardiness zone: 2a