Oregano (Origanum vulgare ssp. hirtum) is a multi-purpose herb to use in the kitchen. It offers a lot of vitamins and minerals along with its sharp herbal flavor to our food. Early in the season – before oregano blooms - the oregano leaf flavor is milder. Both leaves and flowers are edible. The flowers are milder than the leaves overall. I grow my oregano in a pot It Winters indoors in our Solar Room and Summers outdoors on the deck.