Just get some pH adjuster or something and measure the pH and if it's low put it in the soil and transplant that plant in the new soil and water with water that isnt too acidic or alkaline and see if the pH balances out.

Btw I dont feel like looking for home made supplies that you could add to your soil to lower the pH just try Google instead .
orangeman Reviewed by orangeman on . Re - potting The soil that im using it has a ph scale level to high (13). I bought a soil it a ph scale level 6-7 and i want to take that bad soil all out and put the plant in the new soil... It´s possible? ill the plant die? or it´s better to clean the soil? If so, can you tell me what natural substance can i use and the amounts and mixtures. Rating: 5