Related to carnations, these dianthus, also known as pinks, go far beyond that one color. 
 
Sweet William is extremely winter hardy and will send up many strong stems from low, basal growth.  Flowers are a cluster of smaller blooms and are extremely long-lasting.  Cut when flowers are 2/3 open.
 
Choose a single color variety or the mix which includes white and bicolor.  Select multiple plants to obtain more colors from the mix.
 
Plant 6-10" apart and water well until established.  Seedlings come in a 2.5" pot.
 
While plants often come back the next year, they may not be as rigorous or require thinning as they may reseed and spread.
 
There is no refund or guarantee on plants after purchase.