Answer: Burpee sells greenhouse and cold frame plans, including detailed drawings and materials lists. They also sell a greenhouse kit for a 8.5' x 10' greenhouse. The kit includes the necessary PVC pipe and plastic covering, door, exhaust fan, and hardware; you supply the lumber. You can contact Burpee at 800-888-1447 for ordering information.<br><br>National Gardening Association (ph# 800-538-7476 ext. 124) sells kits for larger greenhouses (12' x 16', 12' x 20' and 12' x 24') often used in educational settings.
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