I have 3 clones that I've had for about a month now, and I transplanted them and gave them superthrive to prevent shock 2 weeks ago. They've doubled in size in these 2 weeks and I think they're ready for nutes, but I wanted to check on here to be sure. I'm going to be feeding them maxsea all purpose, which is a water soluble seaweed nutrient mix (I'll post the link so you guys can check it out). It says on the instructions to feed them one heaping tablespoon in a gallon of water for intermittent feeding, so I'm going to feed every week and a half.
http://www.maxsea.biz/
http://www.maxsea.biz/