Spiraea x vanhouttei is a deciduous shrub that is native to China. The plant has a dense, upright growth habit and can reach a height of 10 feet. The leaves are ovate-shaped and the flowers are white. The plant blooms in the spring and summer.
Related plant:
Spiraea Grefsheim
Related plant:
Spiraea Nipponica Snowmound
About soil condition, Spiraea x vanhouttei prefers well-drained soils, and can tolerate a wide range of pH levels. It is not particular about soil type, as long as the soil is not poorly-drained. This shrub is also tolerant of salty conditions.
Just like other spiraea plants, the spiraea x vanhouttei requires full sun to partial sun in order to prosper. It is best to plant this shrub in an area of your garden that gets at least six hours of sunlight each day. If you live in an area with very hot summers, it is best to provide some afternoon shade for your vanhouttei spiraea.
The temperature condition for the Spiraea x vanhouttei is that it should be in a location that has full sun to partial shade. The ideal temperature for this plant is between 60 to 80 degrees Fahrenheit. It is also important to make sure that the plant does not get too much direct sunlight, as this can cause the leaves to scorch.
Ideal humidity condition for this plant is between 40 to 60 percent. If the humidity level falls below 40 percent, the leaves will start to turn brown and drop off. The flowers will also start to wilt and drop off the plant. If the humidity level rises above 60 percent, the leaves will start to yellow and fall off the plant. The flowers will also start to wilt and drop off the plant.
Mentioning fertilizer, this kind of plant need little to no fertilizer. However, a light fertilizer may be applied in early spring if desired. The roots of this plant are rather shallow, so be careful not to damage them when working in the area.
Pruning is an important part of spiraea x vanhouttei care. This shrub blooms on new wood, so it is important to prune it regularly to encourage new growth and flower production. The best time to prune is in late winter or early spring, before new growth begins. Spiraea x vanhouttei can be pruned quite heavily if necessary, and will still produce an abundance of flowers.
Propagation of spiraea x vanhouttei is typically done through softwood cuttings taken in late spring or early summer. The cuttings should be 4-6 inches long and taken from new growth. The cuttings should be placed in a well-drained, sterile potting mix and kept moist until roots have developed. Once roots have developed, the plant can be transplanted to its permanent location.
Usually, the plant growth rate during the spring and summer. However, during the fall and winter the growth rate typically decreases. Nevertheless, with the proper amount of care, this plant can still thrive and produce beautiful flowers during these colder months.
Common problems for this kind of plant are black leaf spot, powdery mildew, root rot, and stem canker. Black leaf spot is a fungal disease that affects the leaves of the plant, causing them to turn black and eventually fall off. Powdery mildew is another fungal disease that affects the leaves and stems of the plant, causing them to become covered in a white, powdery substance. Root rot is a serious disease that can kill the plant, and is caused by too much water and/or poor drainage. Stem canker is a fungal disease that affects the stems of the plant, causing them to become black and brittle.
Source:
Vanhoutte Spirea (Spiraea x vanhouttei) - Selecting Shrubs for
Vanhoutte Spirea (Spiraea x vanhouttei)
Spiraea x vanhouttei | Landscape Plant Propagation Information