Ponderosa lemon trees are slow growing but reach a height of 12 to 24 feet at maturity. The leaves are long, evergreen, glossy, and citron-like, being ovate elliptic in shape and lemon scented. They have medium thick branches with many spines. New growth is purple tinged, as are the flowers. Ponderosa lemon also has larger than average citrus flowers, and bears fruit throughout the year. When grown as an ornamental, pruning is required to control the shape, and it may be trained as a bush or tree.