|This short, bulbous plant blooms in early spring. Leaves are basal and grasslike, with silver midrib. 'Haarlem Gem' bears single, tubular, silvery-lavender flowers with bright yellow stamens, up to 2 1/2 inches long. If you are not a strict "clean lawn" person, crocus are welcomed additions sown freely in the lawn in generous drifts, especially at the end of walks, along the edge of drives, or beneath trees. This works especially well in warm season lawns, because by the time you mow the lawn for the first time, it's ok to to mow the crocus foliage.