Dont have any experience with hydro but common cause of yellowing leaves is nitrogen deficiency. So give them some nutes with a high amount of nitrogen in and that should stop them yellowing further and make them nice n green again!
Charbud Reviewed by Charbud on . Over or under fertilized? Well my plant's leaves are starting to yellow. It all happened, I believe, when I accidentally put no bloom nutes in the reservoir about a week ago. Instead, I must of put extra "grow" nutes from the GH flora series. Unfortunately, a few leaves are showing a little bit of browning. Some stems are turning a purplish color that even runs from the stem into the leaves. The yellowing isn't as much yellowing as it is the leaves going pale. A few days ago, I picked up some Maxi-grow and maxi-bloom Rating: 5