Adding Alfalfa to Fox Farms

I am getting ready to prepare a soil mix for my grow, and would like to go organic. I will be using 2 parts Ocean Forrest to 1 part Light Warrior. I noticed that neither of these contained alfalfa, which I understand is very beneficial to growth, and I would like to utilize it. I do have the BMO 4-pack coming, and I believe one of those contains some alfalfa, but I would like to get some in the mix. I picked up a bag of alfalfa feed cubes, anyone have an idea how much I should add to this 4 sqf mix? Also, I feel pretty comfortable with the final product, but am open to suggestions about how I might top it off with any more additions, or supplements to go with the BMO.
Thanks!

crush it up, use roughly 3-4 cups. mix it like a week ahead of time, I added 12 tablespoons (3/4 cup) to my mix and it raised the soil teperuature about 15 deg. It gets hot as its breaks down