White Knight Sweet Alyssum (Lobularia) Live Plant, White Flowers, 4.25 in. Grande White Knight Sweet Alyssum from Proven Winners has masses of white blooms on green foliage. It is heat and coldtolerant and attractsbees and butterflies. Prefers partial to full sun (4+ hours) and moist soil. Grows to be 4-6 inches tall and1.5-2feet wide. Always ships in bloom year-round. Annuals are 5-10 inches tall when they are shipped. Hardiness Zones: 9-11. Be sure to check your USDA Hardiness Zone if you want this plant to come back year after year. Hand-picked by experienced shippers and delivered fresh from the greenhouse in a 4.25 in.grande container. Proven Winners guarantees all of its plants are correctly packaged in specially designed boxes, arrive in good condition and are accurately labeled. This lobularia makes a great groundcover and works well in containers. To introduce the most unique, highest quality plants, Proven Winners are tested for years in gardens across the world. Our plants are unsurpassed in terms of flowering, growth and garden performance.