There has been much confusion about promix. I contacted the co who makes it
and since it is soiless it is considered a medium for hydroponics and the Ph
should be 5.9.
and68i Reviewed by and68i on . End to the debate/promix & PH There has been much confusion about promix. I contacted the co who makes it and since it is soiless it is considered a medium for hydroponics and the Ph should be 5.9. Rating: 5