Here is a kit with everything you need to build a 8x10ft greenhouse in your backyard. The Janco Palmetto Greenhouse Kit comes with aluminum and glass parts. It can handle 90mph wind load and 25mph snow load. This kit also ships with a solar ridge vent and heavy duty aluminum full-lite door.
This model also comes with butyl sealants throughout. You can buy an exhaust fan kit, Polypropylene exterior shades, and other add-ons to do more with your greenhouse.