im thking latewood is right on the light is to close by the burnt edge's of your leaf. but as for the nute's get a pin for your ppm/ec like a truncheon meter..most of the time if you over fert your plant will curl up not down..looks like a lack of? you mite keep your eye's on your ph as it may be a little acitic or not but it is a big part of it......the king