See the yellow tiger stripes in between the veins of the leaves, 9/10 its caused by magnesium deficiency, even though other deficiencies can cause similar affects, there are usually micro nutrient which you definitely shouldnt be deficient in. I would recommend just feeding them a little extra
Cal-Mag, usually you dont have to with
fox farm because they ph buffer with Dolomite lime, but you never know.
When you working with charged soils like
foxfarm what you might be feeding in might be 6.5ph, but it may change once its been sitting in the soil.
If you have a PH meter or PPM meter test the run off to what the run off comes out at. Back when I ran
happy frog (
foxfarm) I had a couple bags that came out at 5.5PH! Really hurt my crop... Started getting deficiencies like crazy. Not all the bags tend to be identical unfortunately, and over time the PH buffer they put in there gets depleted.
If your PH run off is too low just get some dolomite lime and sprinkle about a tablespoon or two into the water when you go to feed, over time the PH will naturally rise back up as well as give you extra PH buffering and time released
CAL-MAG.
I even still mix that even with my coco and never had to worry about adding any extra
CAL-MAG anymore! Its a great product.
As the soil gets hot or acidic, the dolomite lime neutralizes it, but be careful you can over do it. Just a couple tablespoons at a time thats it!
Also i wouldnt give them nutes... There is plenty in the soil! You are probably creating a lockout... Give them just plain water!
You shouldn't have to ever give plants extra liquid fertilizer when theres already nutrients in the soil itself!
Wait until the soil get depleted of nutrients before adding liquid nutrients, or else go with something like Pro-mix if you want to give nutes!