6.5 to 7 when in soil. And I believe in Hydro it can go as low as 5.2-5.5 to 6.3, somethin like that. I'm not sure but it's around in that range.
orangeman Reviewed by orangeman on . The PH of water? What should the PH of water be which you water the plants with? Thank you for the replies in advanced. Rating: 5