rusty blackhaw viburnum

Rusty blackhaw viburnum (Viburnum 'Royal Guard') should be watered every 2 to 3 days. Start by wetting the top part of the soil and if the water does not penetrate, add a little more water. During hot summer months, increase the amount of water to keep it consistently moist. If you notice the leaves wilting, give it a bit more water. Depending on the temperature and humidity level in your area, rusty blackhaw viburnum should get about 1 to 2 inches of water per week. It is also recommended to water early in the day in order to give the plant enough time to absorb the water before the temperatures get too high.

Rusty blackhaw viburnum (Viburnum 'Royal Guard') is an upright shrub that grows well in full sun to partial shade. The amount of sunlight needed for optimum growth and flowering is around 4 to 6 hours of direct sunlight per day. As this is a deciduous shrub, it should be placed in an area that receives plenty of sun during the flowering season. Since rusty blackhaw is a winter-to-spring bloomer, it is best to have at least 6 hours of sunlight each day from early March until around late May. During the summer months, when the temperatures tend to be much higher, the amount of direct sunlight can be reduced to 4 hours or less each day to prevent excessive heat stress.

Rusty Blackhaw viburnum (Viburnum 'Royal Guard') is best pruned in late winter or early spring, just before the new growth begins. Avoid pruning after new growth appears, as this can encourage new, weak branches to grow in place of sturdy, mature ones. Pruning should generally be light, removing broken, diseased or crossed branches. Remove no more than 1/4 of the total plant volume each year for optimal health of the plant.