Thats nutrient burn from foilar feeding. This is what happens when you spray your plants with too much food and it drips off the leaves
low_rdr Reviewed by low_rdr on . leaves has something wrong with them please help hi there is something wrong with the lower leaves some kind of yellowing i have pics im growing in organic soil i added worm cassings,bat guano ,perlite and azomite the plant is 42 days old and outdoors Rating: 5