This is Dianthus barbatus, also known as Sweet William. This plant likes to live in the full sun, but could use some afternoon shade if you live down south. So if you do keep an eye on it and see if it starts looking sad in afternoon full sun. The birds, bees, and butterflies will especially love this plant when it is in the full sun. Growing to about a foot and a half high, this plant blooms in the middle of the Summer. This is a nectar source for the Giant Swallowtail, Palamedes Swallowtail, Yehl Skipper, Eufala Skipper, Clouded Skipper, Common Roadside-Skipper, and Eastern Tiger Swallowtail butterflies, and the Banded sphinx , and Heliothis phloxiphaga moths. The flowers of this plant are edible. This biennial or short lived perennial can survive the winter in USDA Hardiness Zones 4 to 8.