soo I'm using 250w hps for them at the moment im using 70% coco and 30% perlite from the brand plant magic im using canna nutes ive give them a very low strength dose today using canna coco A/B and rhizontonic its the first feed ive gave them ive been using ph 5.9 and the EC was 0.5 i did have a bit of a stretch at first but managed to stop that by moving my light a little closer