Can i use orchid soil for growing ?

all is in the title, so good idea ?

Yes, but for growing orchids.

Grodan rockwool is used for orchids

Grodan rockwool is used for orchids because its high ph

Refer to MJ growing guides in books, magazines, and online, and compare NPK ratios, and other macro and micro nutes, and check for ideal pH levels and all that first, and see if it is... Man, Idk... WE know about WEED on here, bro...