Grasscity.com Forums - View Single Post - PH Problems - Extreme Yellowing

potpotpot · #19 (**permalink**) 04-24-2008, 05:25 AM

It looks like the old growth is nitrate deficincy, and the new growth is zink or iron deficincy. You can go th the pet store and get a ph test kit and ph up and down. It works 4 me. If your ph is off it will lock out nutrients.

#19 (permalink) 04-24-2008, 05:25 AM
potpotpot Registered User Join Date: Apr 2008 Posts: 3	It looks like the old growth is nitrate deficincy, and the new growth is zink or iron deficincy. You can go th the pet store and get a ph test kit and ph up and down. It works 4 me. If your ph is off it will lock out nutrients.