Mexican Feathergrass Tenuissima ‘Ponytails’ Ornamental Grass Seeds - 50 Seeds Stipa tenuissima is a neat, compact, perennial grass, bearing closely packed, stiff, thread-like stems forming a strongly horizontal shape. in summer, masses of elegant pale feathery seed-heads are held above the foliage. These can be cut & dried when first opened for use in winter arrangements indoors. Alternatively they make a useful winter food source for finches & other seed-eating birds. Grow Stipa tenuissima in well-drained soil in full sun. It works well in a mixed border among herbaceous plants & other grasses. To propagate, divide plants from mid-spring to early summer. Sow the seeds finely in trays containing well drained soil, or sow in cells, 2 to 3 seeds per cell. Cover the seeds with a very fine layer of sieved soil. Seeds germinate in about two to four weeks but can occasionally be slower & irregular. Keep in cooler conditions after germination occurs. Mexican Feathergrass Tenuissima