These popular 4 tier mini greenhouses provide compact and versatile space for storing tender plants germinating seedlings or hardening off plants prior to planting out they provide ideal greenhouse conditions for gardeners who struggle to find growing space made with a steel frame the polypropylene zipped front cover rolls up for tending the plants and for getting them in and out with ease and they also have removable steel mesh trays and brass eyelets for fixing the base securely requi