Organic

Master Gardening
Catalog of gardening tools and supplies including composters, seed starting equipment, greenhouses, fertilizers, and plants.
http://www.mastergardening.com/

Rohde's Nursery and Nature Store
Buy organic gardening products, bird and bat houses, and pest control online, and see price list of Texas native plants.
http://beorganic.com/

Snow Pond Farm Supply
Offers a full line of organic products for home gardeners and commercial growers.
http://www.snow-pond.com/