(Papaver spp.) Growing these old-fashioned poppies offers triple rewards: glorious flowers, handsome pods and nutty-tasting seeds from the same ornamental plants. Gray-green Pepperbox plants send up nodding stems of large papery-textured purple, red and pale pink blossoms, all with dark center blotches. After the petals drop, their big pods swell as the blue-black seeds mature to harvest when dry for baking. Or keep the pods for beautiful decorations.