Koreanspice viburnum Viburnum carlesii 'Diana'

Water

The Korean Spice Viburnum should be watered deeply and thoroughly, providing the soil with even moisture but allowing it to dry slightly between waterings to prevent waterlogging. Typically, during the growing season, it may need watering once a week, but this can vary depending on weather conditions. In the absence of rain, aim for approximately 1 to 1.5 gallons of water per week for an established plant. Younger or transplanted shrubs may need more frequent watering, like two to three times a week, until their root systems are fully established.

Light

The Korean Spice Viburnum thrives in areas with full sun to partial shade. It performs best when it receives at least six hours of sunlight a day, but it can also tolerate and bloom in partial shade. The ideal spot for this plant is one where it can soak up the morning light and receive protection from the harsh afternoon sun, especially in hotter climates.

Temperature

The Korean Spice Viburnum does well in a wide range of temperatures but prefers a moderate climate. It can typically withstand temperatures as low as 0 degrees Fahrenheit and as high as 80 degrees Fahrenheit. The optimal growing temperature range is between 60 and 75 degrees Fahrenheit, ensuring healthy growth and flowering.

Pruning

Pruning the Korean Spice Viburnum is necessary to maintain its shape and promote vigorous growth. It is best to prune immediately after flowering in late spring or early summer, to avoid cutting off next year's buds. Removing old or crossed branches and thinning out the shrub every few years encourages better air circulation and light penetration.

Cleaning

As needed

Soil

The Korean Spice Viburnum prefers moist, well-draining soil with a high organic content. A soil mix of garden loam, leaf mold or compost, and some sand or perlite to improve drainage is ideal. The optimal soil pH for Korean Spice Viburnum is slightly acidic to neutral, around 5.5 to 7.0.

Repotting

Korean Spice Viburnum is typically grown in the ground and does not require frequent repotting. If grown in a container, repot it every 2-3 years or when the plant becomes root-bound.

Humidity & Misting

Korean Spice Viburnum thrives in average outdoor humidity levels. It does not require any special humidity requirements when grown in its preferred outdoor environment.

Suitable locations

• Indoor

  Provide bright light, ensure good air circulation.

• Outdoor

  Plant in well-draining soil, partial to full sun.

• Hardiness zone

  4-8 USDA

Life cycle

The Korean Spice Viburnum 'Diana' starts its life cycle when its seeds germinate, often in spring, with ideal conditions of moist soil and partial sunlight. The seedling then develops into a young plant with soft, green foliage and begins to establish a root system. As it matures, the shrub experiences vegetative growth, producing dense, dark green leaves and building a woody structure. During spring, it enters the reproductive stage, displaying fragrant pink to white flower clusters that attract pollinators and ultimately produce red to black berries in the fall. The plant reaches maturity in several years, during which it continues to flower annually while it thickens and its height and spread increase. As the shrub ages, it may enter a phase of decline where growth slows and it becomes more susceptible to environmental stresses or disease, eventually leading to the end of its life cycle.

Propogation

• Propogation time

  Spring to Early Summer

• The Viburnum carlesii 'Diana', commonly known as Korean Spice Viburnum, is most successfully propagated by softwood cuttings in late spring to early summer when new growth is just beginning to harden but is still flexible. To propagate, take a cutting of about 4 to 6 inches (10 to 15 centimeters) long, making sure it has several leaf nodes. Strip the leaves from the bottom half of the cutting and dip the cut end in rooting hormone to encourage root growth. Then, plant the cutting in a moist potting mix, ensuring at least two leaf nodes are buried below the surface. Covering the pot with a plastic bag can help maintain humidity, but it should not touch the leaves directly. Keep the soil moist and wait several weeks for the cutting to root before transplanting it to a more permanent location.