3-4 years ago I remember making a concoction of vinegar (I cant remember what the acid content was at the time) and salt and sprayed unwanted plants in my flower beds. I cant remember the exact outcome, but I do remember some plants dying, and I suspect I applied on a hot day in july or august. I was recently considering this as I do not want to spray gly on my plot in my yard. So a few days ago I was checking my beehive in my yard and notice that in a few select areas where the buckwheat is near the hive and is less progressive I have a plethora of grasses coming in, in other spots the canopy and density of the buckwheat is great enough nothing has grown underneath. The buckwheat will likely fully ripen in the next 2-3 weeks or so..... so in the advent off trying to stay away spraying gly I have really been debating what to do. My plan originally was to roller crimp this year and spread seed before crimping, which should line up with a forthcoming rain... well because I'm dealing with grasses and plan on planting a turnips, beetsand radish, I know my germination time will be a bit slower and to outcompete these grasses will be tough... since this is my first roller crimping exercise I am debating that I should spray something like a vinegar/salt mix to try and eliminate grasses (after crimping)... or should I crimp the buckwheat now and not get a mature plant (I'm ok with a bit of reseeding in either scenario) then let it die then in 3 weeks cultivate (by tilling) the dead material (cutting up the grass) then planting mid to late august, then hoping the new mix out lasts the grass as the cool season sets in? I was not planning on cultivating again until next years rotation into clover/rye combo...so id like some input here.