Canadiananswered grow question 4 years ago I try one time and only with worm castin and did not work very well you need something else to make it more Airy otherwise you just end up with muddy soil when you water them making it hard for roots to develop what I have found out to be the best is mixing something like Coco Loco or Koko pop from fox form with worm cast at no more than 35% more than this and you start to create a very muddy clay-like soil .you can also use others like Hydroponics soil and I have great results with those what I have not use is worm castings with perlite only to see how that works out but every time I used too much of worm casting it has become muddy medium not too good.
Hope this tip helps you out have a happy grow