You can get claw if your plant is next to a drafty part of the room too but for me there is no way they are nitrogen overdosed as they are too pale,,looking at them they look like they've used up the nutes in the soil a while back&the paling of the big leaves was your sign from the plant to say hey I'm hungry feed me,when they're overdosed the leaf tips would all be burnt,,old damaged leaves never recover so look for any new growth coming in& should be green,I think your in bloom so go & buy a good base nute specifically for the bloom phase like canna,biobizz,atami,&feed daily on a regular time schedule&if the pot feels heavy enough at watering time just leave it&feed it at the same time next day when it will be lighter as the plant will have drank the excess..Theres usually4/6weeks. Of food in average bags of soil/compost&iv tried most,,so I usually feed water for1st3week weeks then1/4strength veg feed till week4then I go up to half strength for a week till week 5then as they are in15litre pots they get a flush with 60litres of pH 6.5water which is ample,then let the pots get almost bone dry before their next feed,then now when you feed them up the feed again to around80/90%of the recommended top strength(never go full strength if not using R.Owater)as any bloom boosters or calmag or any additives will also take yourECevel up on top of any minerals in your tap water which are already usually at around 0.4E.C.or400ppm..Buy a bloom nute&feed 3/4strength if your
sure you've only fed them what you say you will be fine&remember your looking for improvement in new growth not on old leaves..Hope that helped,peace bro..
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