If I were inclined to believe in God as a helpful, sky-residing fellow lording it over us all from his perch in the heavens, I would present him with three words of challenge by which he might explain himself and his creation: fleas, mosquitos, and the (damn) weeds that repopulate my poppy patch with unremitting, increasing fecundity every year. Of the three, this last one is the matter that most occupies my thoughts every April, as spring and its weeds kick into high gear. Let me be clear: I bow deeply to the wonder of the earth’s regeneration. The exultation,…