i would say yes it looks like its time to feed them puppy`s. i can`t say this enough i`m not going to be much help when it comes to feeding in dirt. i would start low and work my way up, like 25% or 50% nute strength and work my way up. just keep an eye on how they react to them.
i took this pic this morning before the lights came on. i thought it would be a good idea to show it to you, so you could see just how resilient these plants can be. i broke the top about 3 weeks ago, but i just let it go. i watched the fan leaves on the broken part of the cola, it never has shown any problems so i just let it go. the red arrow is the pointing to the top of the cola, the blue circle is the area that broke, below the arrow you can see the fan is the same color as the others. once i had a light fall a few weeks before harvest, it cut the main stem of a plant, i made a splint for it and it never missed a beat.