Do smaller plants in bigger pots still need to be watered till 10% run off ??

Hey guys, After I had some roots poking out the bottom of my smaller containers I repotted 2 out of my 5 plants into bigger pots ... now do I still have to feed the plants in the bigger pots till 10% runoff or can I just make sure all the coco around them has been hit with the nutrient solution? Also in the second picture, I have drawn a circle around the plant ... is it ok just to water here? or should I water then entire pot ??

 

Thanks for the advice .. that's exactly what I was thinking after I read up on it a bit .. you seem to get a build up of nutes/salts in coco if you don't get some runoff