Greenhouse & coldframe set up
I've planned to get a new greenshouse, which is the PE cover with DIY staging that sold in Wilko, also a 3ftx3ft coldframe to overwinter my newly potted plants. just a question before I can set both up--should it be gravel first then poly cover as the base to cut off weeds, or the other way round? I'm just wonder if i put poly cloth as base will the enclosed enviroment gets too condensed with trap water, also there might be slugs & snails's best hibernate places??
Thank you for all advise