Nitrogen Def with PPM 920?? - DWC Outdoor

First picture shows an older leaf not getting enough light, second picture shows burning from fertilisers/water on the leaf under strong light. Nothing to worry about really, however probably best to foliar feed just before lights out or turn your grow light(s) off and use just a "normal" light if you have to foliar feed during the middle of the "lights on" cycle and not put your main grow light(s) back on until all the leaves are well and truly dry. My preference is the "just before lights out" method, as it gives plenty of time for the leaves to absorb the food and plenty of time for the leaves to dry out. Water on the leaves acts like a magnifying glass, and we all know what happens to ants when "magnified" with sunlight! Hope this helps... Organoman.