I grew in soil my first couple years and I switched to soilless mix about 2 years ago at first it was strictly peat amended at various ratios with Perlite vermiculite and dolomite lime and resently I started using coco at first just plain coco all by itself and I personally feel that all by itself it holds to much water so I added perlite and verm because th le amount of k and now I'm using peat coco perlite all mixed and some lime it all works but add any portion of perlite to coco or peat and you cant go rong it helps with drainage and also helps the soil hold more air