No fertilizer of ANY SORT.
Furthermore, Nitrogen promotes FOLIAGE growth, while Phosphorous would be what you are after. That comes organically from bone meal or bat crap. But that is for much later, when your plant is ready for a transplant.

If I may give you some advice as a new grower:
You are seriously over-thinking this. The little sprout can take care of itself for a while, given LIGHT, VENTILATION, and WATER. The seed leaves are like fat in animals- stored nutrition which may be used later, and they need nothing else for the first 2 weeks of life. In fact, they don't want anything else, because they are very tender and delicate and can be killed with fertilizer. In fact, some types of herbicides are just super-fertilizers, that scorch the plants to death! Don't start with organic soil amendments. You have to learn the plant first. I am serious about recommending SIMPLE soil for noobies, with more perlite than you think you need, because you WILL make mistakes at some point and have to flush.

I'd read the link in my sig start to finish and then get going on some new beans in case this doesn't work out.
stinkyattic Reviewed by stinkyattic on . Germinating Mold on Soil? Pix I started these two days ago, letting them sit in water until the sprouting root became a good length for plating. Casing still on, we planted. I did some experimenting with this batch. I planted them and instead of giving them water, I gave them a 1/2 worm poop 1/2 water. I read that you can give itty bitty amounts of nutes to seedlings to promote better growth. and the NPK is .03-.002-.02 broken down into half is .015-.001-.01 That seems like an itty bitty amount right? And to clarify, the Rating: 5