View attachment 2069957
I'm thinking N or P. You should def feed them. But then again I don't know anything else about your grow just basing that on a picture. Good luck
its not N the plants are 4 weeks into flowering... feeding 1/4 teaspoon of dyna grow bloom with open sesame for 3 weeks and last week used beasti bloom in fox farm happy frog soil watering with RO with Calmag using water feed water feed type schedule...