Scotch Pine, often pyramidally-shaped and relatively fast-growing in its youth, slows down tremendously with age and develops a crown that may be broadly rounded, flat-topped, or scalloped. Although it is a two-needle pine and susceptible to both Diplodia Tip Blight (which devastates Austrian Pine) and Pine Sawfly Larvae (which plagues Mugo Pine), it often does not get these twin potential liabilities (although it can).