I've always used Pemberton Farms for buying my flowers to plant in planters and windowboxes. They have beautifully geown flowers, a nice variety, and are helpful in letting you know how to care for them. You'd get better prices at Home Depot but the quality is so much better at Pemberton. It can get very crowded on the weekends, making it hard to navigate the aisles with your wagon - but it's a great place. Check it out!