While I cannot recommend a liquid fert to you, I can tell you they are not useless and depending on what you use and how you use it can give you extremely quick and oustanding results. Maybe smallaxe has never heard of "foliar feed". Typically you will get fast results with not much longevity out of foliar feeds. I think the last thing you will have to worry about is the fert not being used by the time the ground freezes. They are also very handy when the area covered needs a broadcast app of herbicide.(It all can be mixed in the tank together). Try to look up Ant. He has been using liquid ferts most of this season.
"The Poor Fish" circa 1930's: The Poor Fish wouldn't have been caught if he'd known enough to keep his fool mouth shut.