Alyssum is an old-fashioned favorite. The dainty, spreading plants are covered with clusters of small, sweetly fragrant flowers. Bees love the lavender and white blossoms. Sow Lobularia flower seed directly outdoors as edging, between stepping stones, and in rock gardens, containers, and hanging baskets. Trim to keep fresh blossoms, and to start new shoots, shake flower seed from older plants directly on the soil.