Can a more experienced grower tell me what to expect from this mix

[the image reaper]

my understanding, horse manure is too hot even to use for tomatoes ... steer manure is better ... with the horse manure, Miracle Gro soil, etc, you won't have to add nutes until the flower phase, and then, you 'may' experience less flowering because of all the residual nitrogens in the soil ... but, it might grow like a real sumbitch, too ... ya just never know, because its a WEED ...