By and large, viburnums have few pest problems, especially if they are not subjected to excessive temperature or drought stress. Leaf spot, a bacterial disease, can become a problem with the Koreanspice viburnums. As a rule, viburnums should not be heavily pruned, but you may need to occasionally remove crossing branches or wayward twigs. To renew growth on old viburnums, you can selectively remove some of the large, older branches at the base, which will encourage the growth of vigorous new shoots. Many people are unaware that fall is a wonderful time to plant.
Gardeners often think of spring as the planting season and miss out on a great opportunity.
The soil is perfect. Also the soil is soft and workable - which is excellent for root growth. Cool air temperatures minimize wilting and transplant shock. The days are growing shorter. Thus the plants receive fewer hours of searing sun compared to mid-summer.