Spring Grove™ Arborvitae makes a beautiful addition to the landscape with year-round visual interest. Flowers appear in late spring, adding welcome seasonal color to the landscape. At maturity it reaches 20 to 30 feet tall with a 10 to 12 feet spread, so give it room to develop its full canopy. Plant in full sun for the best results. It thrives in zones 5 through 9. As a native plant, it supports local ecosystems and needs very little extra care once established.