Hey I'm by no means an expert grower, but I've had several succesful crops and even my current one is using mg soil and fertilizer and their brand perlite. It may not be perfect for weed but my other plants love it and my weed plants are doing great. I hope your tests give you good results! The only advice I have for you is picking a soil low in nitrogen, I do this by dilluting with perlite and the african violet is what I use to avoid ph issues but ill be very interested in your findings!