I would like to buy a greenhouse 8′ by 6′ approx. to start plants in winter and spring because there is very little growth here until June. Site is exposed. Not too expensive. Glass or poly? which is best? UV filter? What are the features/problems to be aware of? Where to buy and secondhand options
In a very exposed site, most aluminium greenhouses are not really secure and can blown blown down in a gale. A tunnel is generally more robust.
UV filetered polythene lasts longer. Don’t skip on the quality of polythene as god ones can last many years, way more than indicated.