You don't have to rip out a portion of your existing ornamental garden to add a vegetable garden. You can mix edible plants among your flower beds. Many edible plants work well as edging for a bed or walkway. Carrots are one example. Their ferny foliage makes an appealing border.
To learn other ways to mix edible and ornamental plants, register for our free online workshop "How to Eat Your Front Yard," May 5, 2010.