Create a greenhouse for growing edible herbs and leafy greens throughout the year. The greenhouse cover and supports are all you need to extend the harvests of your garden. Three plastic-coated steel arches fitted with sturdy wood rods provide the framework for the clear plastic greenhouse cover. The cover also ensures a frost-free environment for growing tender seedlings in the early spring, encouraging an earlier initial harvest. Specifically designed to fit on our natural willow planter (sold separately). Cover fabricated of heavy-duty clear PVC protects plants from temperature extremes and extends the growing season. Center flap of cover zips opens for easy access and temperature adjustment. Cover withstands temperatures from 14deg.F to 86deg.F. Steel and wood supports attach easily through willow weave of planters and stake firmly into potting soil. Set includes three arched supports and a plastic greenhouse cover. Cover and supports can be purchased separately. Cover dimensions - 16" x 11 3/4" x 18" high; 10 oz. Minimal assembly required. Designed by a company founded in Sheffield, England, in 1730 and renowned for its high-quality gardening tools.