This is a perennial form of the common white alyssum (Lobulariamaritima). ‘Frosty Knight’ has attractive variegated leaves and grows with a lax, cascading habit. Masses of sweetly scented, white flowers adorn the plants all through spring and summer. Grow in full sun in well drained soil conditions. They’re fantastic cascading over walls, flowing out of large pots or simply filling up a hanging basket. This cutting grown Lobularia is another top plant in the Proven Winner range.