<P>Suburban mom Jane Jeffry and her equally green-thumbless best friend Shelley Nowack could kill plastic plants. But their scheme to improve themselves vegetatively dies on the vine when the celebrated botanist slated to teach a class at the local Community Center is mysteriously beaten into a coma -- and her replacement turns out to be Dr. Stewart Eastman, an arrogant, self-promoting boor. Did Dr. Eastman or a fellow classmate assault their original instructor? And who later plants a corpse in Eastman's compost heap? There's certainly an abundant crop of suspects. And it's up to Jane to weed out a killer.</p>