250 + Dark Opal Basil Seeds | Seed Supply | Plants on sale online
 
 
As basil has many different varieties, Dark Opal Basil Herb is a striking heirloom that was grown during the 1950s at the University of Connecticut. With smooth burgundy-colored leaves, Dark Opal Basil gives off a bold aroma that's a blend between licorice, mint, ginger and sweet tea.