What Entropy Means to Me — George Alec Effinger

Doctor, watch out! As Dore stood by, he saw the Doctor backing slowly into the corner where he would meet his fate. Initially defending himself with a torch, the Doctor searched frantically for a new method of defense. The crimson mass is lunging forward using long, tentacle-like attachments: what is that thing? Slowly the subhuman blob comes in to focus, and Dore realizes . . . it's a colossal radish! This is a monster never before wrestled with; what are they going to do? After reading this vegetative tale, you won't look at your garden the same way again..