Sure, you can spend all weekend prowling the local gardening stores, picking out the perfect annuals and organic herbs and filling up the back of your SUV with bags of mulch and fertilizer. But when Sunday night rolls around and all the stores have closed, how do you sate your gardening jones? Click on over to Clean Air Gardening online. Their selection of products for environmentally friendly gardening is vast: rain barrels, compost bins, organic fertilizers and additives. The big item is the garden tool that jump-started site founder Lars Hundley's passion for online retailing: the push reel mower. Our order (an upside-down tomato planter, if you're curious) arrived quickly and was well-packaged. While Clean Air Gardening is online only, now that the seeds of retail success have been planted, they plan to plant a showroom in the Dallas Design District soon.