In general, Coralbells are tough plants with few problems. While tolerant of alkaline soils, Grape Soda Coralbells can experience rot with poor drainage. Amending soil with compost when planting will mitigate this issue.
In full sun, the leaves can scorch if there is not enough soil moisture. Conversely, Grape Soda Coralbells can get crown rot in shade with too much moisture. Divide in spring when center has become woody (typically every 3-4 years).
Grape Soda Coralbells can frost heave in Wisconsin winters if improperly planted or not adequately protected. When planting, amend soil with compost and plant Grape Soda Coralbells even with the surrounding soil. Applying a fall mulch of 3-4″ will prevent frost heaving. If frost heaving is noticed, push the crown back into the soil to protect the roots.
Spent flower stalks can be removed when Grape Soda Coralbells has stopped blooming. This may encourage a second bloom. The leaves are semi evergreen and may hold their color if winter is not too severe, or if adequately protected with mulch and snow cover. Damaged and withered leaves should be cleaned up in spring.