http://www.gardenguides.com/ - information on planting bulbs in winter

http://www.gardenguides.com/67841-beginning-flower-gardening-tips.html - specific article on beginner flower gardening tips (not zone specific)

http://www.bhg.com/gardening/flowers/perennials/perennials-with-drought-tolerance/ - info on perennials and other garden flowers

http://www.veggiegardeningtips.com/category/herbs-and-edible-flowers/ - interesting article on herbs and edible flowers

http://www.dotcomwomen.com/home/gardening/flower/index.shtml - variety of flower growing articles and tips (not zone specific)