Don't worry....but do try to fix it. If they yellow and pull off easily it's probably lack of nitrogen. But you have a pretty steady feed i see, so possibly bring that ph down a few points, 7 is a tad high. With how much nutrients you're feeding there shouldn't be many deficiencies, so that tells me its there but not available.
Also with the leaves hanging a little low are your pots drying out fast being outdoors?