How Water Hardness affect Plant Growth in Containers. Dec 19, 2019 20:15:20 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Admin on Dec 19, 2019 20:15:20 GMT Fertilizers containing significant quantities of calcium should be avoided with hard water.... more at www.chimneyrockhemp.com/tips-to-grow-hemp-profitably