how are ya? from what i have heard coco is pretty much a hydro medium so it wont actually have much nutes in it to begin with asuming what is also in the soil mix has. plant that size i would confidently give 1\4 strength nutes.
dont know how much help that was. btw you could check out this log it was done in coco with white widows


http://boards.cannabis.com/grow-log/...ized-coco.html
GraSSy12 Reviewed by GraSSy12 on . BioCanna - Trainwreck & White Rhino (GHS) - 600W HPS - 12 Plants @ 3 USG Pots Hi Guys; I just signed up and this is my very first post. Without going into great detail of why I didn't start posting this inforation on this forum sooner, let's enjoy the show from now on.... :) Now, I grew a couple of times many years ago and as it turns out, I am starting to make all the newbie skrew ups all over again. In other words - I could really, really used some assistance. The project started a few weeks ago with a good friend haven given me 4 White Rhino and 8 Trainwreck Rating: 5