Gardening Direct

What are the best flowers that grow in very hot direct sun?
I have a garden to the north that is constantly in the sun all day with no shade and I planted a large number of them literally die overnight. I wanted to plant flowers, dry but seeds are in place and they did not have enough water to start. Now I have most of the orders to shoot and I'm starting over, I want to plant perennials that will last the distance?
Many perennial plants working in the great sun. If sowing seed directly into the ground, it needs to surface every day in deep water when the plants are established. Zinnia Cosmos Shasta Daisy Gerbera Daisy Azalea Camelia gypsophila (annual) Coreopsis Datura Vinca Calendula Chamomile and a bazillion more Osteospermum. mixtures Wildflowers are fun – great cut flowers inside. seed sources: http://search.yahoo.com/search?p=gurney+seeds&ygmasrchbtn=web+search&fr=ush-ans http://www.jungseed.com/ http://www.waysidegardens.com/webapp/wcs/stores/servlet/StoreCatalogDisplay?catalogId=10067&storeId=10151&langId=-1&mainPage=page1
