The Clementine Tree is a small, easy to grow citrus that produces sweet, easy-peeling fruit that is juicy and seedless. The Clementine Tree is a small, easy to grow citrus that produces sweet, easy-peeling fruit that is juicy and seedless. Clementine Trees reach a mature height of between 8 to 10 feet, and a width of about 6 feet. These trees can be kept even smaller by pruning. The Clementine Tree is a moderately fast grower, and its tasty red-orange fruit matures from June through August. Clementine Trees can be grown outdoors in USDA Zones 8 – 11, or in a container that is moved indoors for the winters in USDA Zones 4 – 11. Their small stature makes them an ideal patio citrus tree and their fragrant white blooms, followed by smooth, bright orange fruit make them a decorative specimen in any home. If you live in an area where you can grow a Clementine Tree in the ground, it’s a great choice for a focal point in your garden.