burned edges

Hello Growing for the first time. Both ladies are growing great so far but suddenly there is one problem popping up in its initial stage and so far I am confused if its Nitrogen/Potassium deficiency or its early sign of Nute-burn? I dont see super dark green leafs so unsure if its nute-burn...

can anybody tell me whats wrong with my plant?? im about 4 weeks into the grow and the bottom leaves seem to be dying,, I also noticed a little bit of clawing and discoloration on the top leaves around the edges