Sulfur Cosmos common name Bright Lights Cosmos. Dazzling yellow to reddish orange single flowers on this striking species. The intense colour attracts birds and beneficial insects, and looks terrific as part of a cut flower mix. Grow in full sun in a variety of soils - tend towards the dry side. Plants grow to about 1m (3') tall, for the middle or front of a mixed border. Blooms May through October. Zones 3-10 All seeds are packaged and for the current growing season .