Thanks for the replies
I have used good fortified mixes such as BCuz which was recomended but I am told that due to the high peat content it can go acidic . I usually transplant about every 4 weeks but that varies abit . I use Dolomitic Lime to keep the ph up but it only seems to work for a couple of weeks . Maybe I need more lime but I would rather treat the disease than the symtom.