White Boltonia, Boltonia asteroides latisquama ‘Snowbank’, is a low-maintenance perennial with white daisylike blooms. Get facts and information on growing boltonia, especially white boltonia, in your yard and garden.
Boltonia asteroides grows in Zones 4-9 and will grow 5’ high and 3’ wide. ‘Snowbank’ white boltonia prefers full sun, though it tolerates light shade in the afternoon in hot climates. The soil should be moderately fertile and moist yet well-drained for these lovely white perennials.
This plant can grow in a wetland or moist area. Clusters of tiny, white-like blooms appear in late summer into early fall. ‘Snowbank’ is a good choice because its habit is sturdy and upright and does not need staking like other boltonias, and it is not invasive.
Planting and Care
Plant 36” apart in early spring or fall. Apply a slow-release granular plant food at the time of planting. Follow label directions for the amount and frequency to feed. Cease feeding 6-8 weeks prior to the first frost date. Water deeply when the soil dries. Apply 3” of vegetative mulch in summer and winter to help retain soil moisture. Cut ball in the fall or leave erect for late-season viewing and cut back in early spring.
Propagation is done by division of plants in fall or early spring. Plants started from seed will not come true to type.
White Boltonia is relatively pest free when their cultural needs are met. Moderate soil fertility helps create strong, robust foliage that is not as easily penetrated by pests. Plants grown in too-fertile soil often have more succulent leaves and are more easily invaded by pests. Powdery mildew and fungal leaf spots may occur. Fungicides may be applied, or light infestations (less than 15% damage to foliage) can be tolerated in the landscape.
Other Species of Boltonia: Pink Beauty’ is a cultivar with pink ray florets. Siberian boltonia ( B. Incisa) is only 2-3’ tall, and bears lilac purple flowers.