Lobularia maritima ‘Royal Carpet’. Full Sun, Partial Shade. Moisture. Moderate. Height 2-4″. Bloom Period. Spring, Fall. Sow Dwarf Purple Alyssum seeds around the edge of veggie beds to improve pollination. This Alyssum works well in containers and window boxes. It has a spreading habit, so is useful as a plant to fill in spaces between others. It is attractive to both pollinators and beneficial insects.