Candytuft often attracts butterflies with its spring blooms, which can last for weeks. Give your plants a spot in full sun, and avoid heavy soils that stay wet during the winter. The plants grow about 6-12" tall and will slowly spread to make a pretty groundcover (but don't walk on them). Use this evergreen as a border, in a rock garden or let it spill over a wall or from a windowbox. After the flowers die, give the plants, which are hardy in zones 5-9, a light shearing to keep them bushy. 'Lavish,' shown here, has beautiful, deep lavender flowers.