84-91 Days to maturity. Senecio cineraria. Dusty Miller Silverdust Seeds. Non-GMO, Annual. Silverdust Dusty Miller seeds offer a quaint and unique addition perfect for many gardens prone to heat and drought across the country. Silverdust seeds grow neat 8-10 inches tall shrubs of frosted white that are popularly grown to accent walkways, borders, and patios. Silverdust Dusty Miller is native to the warm Mediterranean and will thrive all summer in similar temperate climates. Grown mostly for its foliage, Silverdust seeds blend well with lavenders, plectranthus, and other similar blooms which are sure to dazzle all the way to the frost. 5,000 seeds/oz. 450 mg Packet (approximately 78 seeds).