I always put epson salt in with my tomatos that way they dont get brown spots. My tomatos are about 10 inches tall. I have them in big plastic tubs. when it is warm I wheel them out cold back in. Had tomatos last year by end of May.

NO horse poop when planting asparagus it will burn it up. Trust me I did it on 50 plants several years ago. Stark Bros sent me another 50 plants though.