Many cool-season vegetables can be tucked into corners of existing beds and borders, transforming a garden into a chic edible landscape. Lettuces are especially adaptable and available in mouth-watering colors that delight the eye and palate. Start seeds in recycled six-packs or four-inch pots for transplanting, or pick up transplants at a nursery. Some eye-catching varieties to consider are mahogany ‘Sea of Red' from Renee's Garden (www.reneesgarden.com) , burgundy tipped mini-romaine ‘Breen' from Johnny's Selected Seeds (www.johnnyseeds.com) and ruffled ‘Lollo Rosso' from Baker Creek Heirloom Seeds (www.rareseeds.com).