Bruce Banner 3 grow number 2

Hey guys,
Im back for grow number 2. This time Bruce Banner 3 has just germinated, and a little root has popped out.
I am wondering if I can use this product, this early. I am still misting as the seed hasnt sprouted yet. Can I mix it into the spray bottle? To help it take root, or should I wait until I see the coyteldon leaves emerge?