Rusty is often a K def, and Pale is often an N def or heat stress.
That's early to be showing the pre-harvest N def; it should not appear significantly until about the last 2 weeks before chop.
Go ahead and do a foliar feed with a weak solution of your bloom nute, with maybe just a bit of grow fert mixed in too to give a SMALL nitrogen boost.
Check the pH of your runoff out of the pots to eliminate pH problems (lockouts) as a cause for the problems.
Find that usb cable! Pics are pretty important in a case like this.
stinkyattic Reviewed by stinkyattic on . Some Pale Leaves and others with a rusty color? Not sure what this is... the pale leaves looks like N diff. but I am not sure what the rusting is. Usually when I see this rusting it's on the bottom 1\3 of the plant, but I have some plants with it up near the top. Any clue? Can try to get some pictures up but I can't find the USB cord for the camera as of right now. Rating: 5