Yes I would usually on advise starting feeding when you have two sets of fan leaves adding nutes now could cause an over feed stunting her and stopping her grow. One cannabis seed has enough feed to get through the first week or so on thier own you can feed seedlings but in a soil system its quite hard to stop and over feed because the soil holds on to whatever nutes you give it part of the reason I use dwc. Though if you wanna feed it I would find the feeding table of the nutriemts you are using and follow the directions there :) best of luck 👊