Weed it and Reap Sister!
An alternative to the popular expression "Read it and Weep Sister!", which involves publicly humiliating others with pure fact. The only difference with this one is that you say it to fellow gardening chums while carrying out essential weeding tasks in your garden. The idea being that you foster generally better growing conditions there.
Busily weeding your lettuce patch with a pal on a Saturday morning in your allotment, you turn to this gardening chum and exclaim: Weed it and Reap Sister! (Then Hi-5!)