WHEN DO I START NUTRIENTS?

It really depends on the medium you’re using and the size of the pot—there’s no one-size-fits-all answer. We’ll need a bit more information from you for a proper recommendation. But let’s assume you’re growing in a light mix. In that case, I’d say you should start adding nutrients after 10 to 14 days, or you can transplant into a larger pot that already contains pre-fertilized soil.