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About product and suppliers:
        Alibaba.com offers 1,955 growing medium products. About 3% of these are other greenhouses, 1% are multi-span greenhouses, and 1% are other non-metallic mineral deposit. 

A wide variety of growing medium options are available to you, such as large, small. You can also choose from pe, pvc, and plastic. As well as from pc sheet, film, and glass. And whether growing medium is double, or single. 

There are 1,924 growing medium suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Spain, which supply 84%, 12%, and 1% of growing medium respectively. 

Growing medium products are most popular in Southeast Asia, North America, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 153 with Other, 129 with ISO9001, and 89 with FSC certification.