Check the pH of your runoff. 6.2 is way too low for soil. How long have the plants been in those pots? A plant can actually get root bound even if it doesn't LOOK huge for the pot, and over time, the soil pH gets low too.
stinkyattic Reviewed by stinkyattic on . Help,leaf problems E-indoor or outdoor=indoor E-soil, soilless, coco, aero, or hydroponic=soil E-specific medium=promix and potting soil CSL-Soil type/brand HCL-Hydro/aero/soilless system type SCL-Anything you have added to the soil=worm castings,bat guono,perlite SCLR-Soil or slab runoff pH=7.0 E-Water source=was using tap water from a well,now spring water out of the bottle E-Source water pH=was 6.2 tap water,now 7.0 HRT-Source water EC (if hydro) Rating: 5