By plastic do you mean the covers? http://www.capitalgardens.co.uk/34greenhouses34-replacement-cover-for-tier-compact-greenhouse-p-23323.html?utm_campaign=goog

By plastic do you mean the covers? http://www.capitalgardens.co.uk/34greenhouses34-replacement-cover-for-tier-compact-greenhouse-p-23323.html?utm_campaign=googlebase&utm_medium=comparisonengine&utm_source=google http://www.capitalgardens.co.uk/34greenhouses34-replacement-... Mine was more expensive than a replacement greenhouse, BUT the plastic was much tougher. (not affiliated in any way, was the first result in google)