Tuscan blue rosemary care is relatively easy. Tuscan blue rosemary plants grow in a more upright pattern than many other rosemary varieties. They can grow up to 7 feet (2 m.) tall and 2 feet (0.5 m.) wide. If you want to keep your plant more compact, you can prune it back heavily (by as much as ½) in the spring after it has finished blooming. Sold in 9cmpot as a set of three