I walked out to my garden after being away for 5 days for our summer trip to Ohio, and couldn’t help but get a little discouraged. It seems like no matter how hard I try to keep up with the weeding, by the time the end of July rolls around, my garden plot is mostly just a big square of grass. I blame the high heat and humidity. After all, who wants to be out hoeing and pulling weeds when you’re dripping with sweat within minutes? Plus, I...