Rhododendron Rhododendron 'Exquisitum' (O)

Water

Rhododendrons, including the 'Exquisitum', prefer consistent moisture but require well-drained soil to prevent root rot. In general, it is best to provide about one inch of water per week, especially during dry spells. This water should be split into two watering sessions of half an inch each, which for an average-sized rhododendron means about 1.5 gallons per session. Water at the base of the plant to avoid wetting the foliage, which can lead to fungal diseases. During the growing season, if rainfall is insufficient, additional watering will be necessary, but always check the soil before watering to ensure it's not already saturated.

Light

Rhododendrons thrive in conditions where they receive dappled sunlight or filtered shade. Direct summer sun can be detrimental to their foliage, so placing 'Exquisitum' in a spot where it is shielded from the harsh afternoon sun is ideal. Morning light with afternoon shade, or a location under the canopy of deciduous trees that allows light through, is best for their growth and blooming.

Temperature

The 'Exquisitum' rhododendron does well in temperate climates and can generally handle temperatures as low as 5°F and as high as 80°F. The ideal temperature for thriving growth is between 60°F and 70°F. To prevent frost damage in colder areas, planting in a sheltered location or providing winter protection may be beneficial for the plant.

Pruning

Prune rhododendrons such as the 'Exquisitum' to maintain shape, remove dead or diseased wood, and promote vigorous growth. The best time to prune is immediately after flowering, as this allows time for new growth to mature and produce buds for the next season. Cut just above the growth joints, and avoid heavy pruning, as this can stress the plant.

Cleaning

As needed

Soil

For Rhododendrons, the best soil mix is acidic, well-draining, and rich in organic matter. A mix of one-third peat moss, one-third pine bark, and one-third perlite is ideal. The soil pH should be between 4.5 and 6.0 for optimal growth.

Repotting

Azaleas, which are part of the Rhododendron genus, should be repotted every 2 to 3 years. The best time to repot them is in late winter or early spring, just before new growth begins.

Humidity & Misting

Rhododendrons thrive best in moderate to high humidity levels. The ideal range is between 40% to 60% relative humidity for optimal plant health.

Suitable locations

• Indoor

  Place in well-lit area away from direct sun; keep humid.

• Outdoor

  Partial shade, acidic soil, mulch well, shelter from wind.

• Hardiness zone

  5-9 USDA

Life cycle

Rhododendron 'Exquisitum' (O), commonly known as Rhododendron, begins its life cycle with seed germination, where the seed requires a period of cold stratification to simulate winter conditions. After germination, the seedling grows gradually, developing a root system and foliage over a few seasons. The plant then enters a vegetative stage, where it focuses on growth and the development of a robust structure, with leaves, branches, stems, and the beginning of flower buds. Following this stage is the flowering period, typically occurring in the spring, where the Rhododendron 'Exquisitum' produces attractive, colorful flowers that attract pollinators. Once pollinated, the flowers develop into seed pods that mature and eventually release seeds, continuing the propagation cycle. Throughout its life, the Rhododendron 'Exquisitum' undergoes periods of dormancy during cold seasons, conserving energy for the next growth cycle.

Propogation

• Propogation time

  Spring-Early Summer

• The most popular method of propagating Rhododendron 'Exquisitum', commonly known as Rhododendron, involves taking semi-hardwood cuttings. This process is best done in the late summer after new growth has partially matured and begun to harden. Cuttings should be about 4 to 6 inches long and include several leaves. The lower leaves are removed, and the cut end is dipped in rooting hormone to encourage root growth. The cutting is then placed in a well-draining potting mix and kept under high humidity and indirect light. It's important to allow for good air circulation to prevent fungal issues. Roots typically form in a few weeks, after which the new plant can gradually be acclimated to less humidity before being transplanted.