Though smaller in size, their intensely colored flowers and vigorous naturalizing habit make these bulbs a must for the USA gardens. plant 7-9 per sq. ftto make a splash in your garden the first year. these are tiny bulbs, but be sure to plant deeply 3-4 inch to encourage best flowering as they spread. All wild flower tulips are sized 5-6 cm. and are commercially propagated in Holland. Best planted in compost enriched garden loam.