63-77 Days to maturity. Lobularia maritima. Snow Crystals Alyssum. Non-GMO, Open-Pollinated, Annual. Snow Crystals flower seeds easily grow eye-catching and fragrant Alyssum mounds bursting in vivid shades of alpine white. Alyssum seeds thrive in a variety of cool and temperate summers and a wide range of soils. Snow Crystals seeds mature into convenient and compact bedding plants. Can also be grown in indoor planters and baskets (full sun) to accent any room with an authentic summertime aroma. Pelleted and Multi-seed Pelleted Seeds.