So I finally found a place that carries bags of pure Worm Castings and when I went to get it the knowledgeable sounding guy asked what I wanted to grow. I told him "tomatoes, cucumbers, cantelopes, etc".. He said the best things he's ever used especially for tomatoes was Mushroom Compost. It's measurements are something like .5, .5, .2. He said it's amazing and was far better than Worm Castings.

Sooooo, does anyone have any experience with Mushroom Compost or know if it is perhaps too strong or contraindicated for marijuana?