milligram milÂ·liÂ·gram (mÄ­l'Ä­-grÄm') n. Abbr. mg A metric unit of mass equal to one thousandth (10-3) of a gram.
Holly bushes also make the list as some of the best large shrubs for privacy as their average growth is 20-30 feet in height and 10 feet in width to provide densely packed protection from both animals and neighbors.
Butterfly bushes are hardy in zones 5 - 9. If you live in a colder zone, your butterfly bushes will likely die over the winter. Even so, you may wish to grow them in a container and treat them as an annual.