When to start nutes will depend on a few things. It wont need any until both the feeder leaves dry up. And it will depend on the soil you will be using and how many nutes are already in the soil. If you transplant to a bigger pot you will have fresh soil in it, and again depending on the soil what nutes are already in it, if any.
If you go with a soil like Fox Farms Ocean Forest, you wont need any nutes for a month or so.
What is the strain? And is it a Photo or Auto plant?