Plantation Products Fine Grade VermiculiteSub Brand: Professional GradeOrganic: NoProduct Type: VermiculiteContainer Size: 8Product Form: GranulesPackaging Type: BaggedMoisture Control: YesWhen to Apply: Spring/SummerImproves soil aeration. Retain moisture and nutrients. Permanent clean odorless non-toxic and sterile. Will not deteriorate, turn moldy or rot. Promotes faster root growth and gives quick.. See full description for further details