Alexander Rhododendron Rhododendron 'Alexander' (EA)

Water

The Rhododendron, commonly referred to as the Azalea, requires consistent moisture but should not be overwatered. Water deeply and thoroughly when the top inch of soil feels dry to the touch, which could be about once a week. During hot weather or if planted in sandy soil, it might need water twice a week. Each watering session should involve slowly adding water until it begins to run out of the bottom of the container, or soaking the ground around the plant with about 1 to 1.5 gallons of water, depending on the size and maturity of the plant. In cooler weather or during the dormant season, reduce the frequency of watering.

Light

Azaleas thrive best in dappled sunlight or partial shade. The ideal spot would be under the canopy of tall trees that provide filtered sunlight, protecting the Azaleas from harsh afternoon sun. They can tolerate some full sun in cooler climates but prefer a few hours of morning light followed by afternoon shade to ensure their delicate flowers do not burn.

Temperature

Azaleas flourish in a wide range of temperatures, but prefer a moderate climate. Ideally, they should be kept in environments where the temperature ranges from 50°F to 70°F. However, they can tolerate temperatures as low as 20°F in the winter and as high as 80°F in the summer, but they will need adequate protection from frost and heat stress at these extremes.

Pruning

Azaleas benefit from pruning to shape the plant, encourage bushiness, and remove dead or diseased wood. Pruning should be done immediately after the spring blooming period, as the plant begins setting new buds shortly after flowers fall. Avoid heavy pruning late in the season as this can remove next year's flowers. Typically, cutting back the branches by about a third is recommended, but only if shaping is needed.

Cleaning

As needed

Soil

Rhododendrons require an acidic soil mix with a pH between 4.5 to 6.0, high in organic matter. A recipe for Rhododendron soil mix would include peat moss, pine bark, and perlite in equal parts to ensure good drainage and aeration. The use of ericaceous compost is also beneficial for these acid-loving plants.

Repotting

Rhododendrons, also known as Azaleas, are typically repotted every 2 to 3 years. It is best to repot these plants in spring just before they enter their growth period, ensuring that they have room to grow and a fresh supply of nutrients.

Humidity & Misting

Azaleas prefer a humidity level of around 40-60%. They thrive in environments with moderate humidity but do not require the high humidity levels that some tropical plants need. Avoiding excessively dry conditions is crucial for their well-being.

Suitable locations

• Indoor

  Place Azaleas in bright, indirect light and water when top soil feels dry.

• Outdoor

  Plant Azaleas in partial shade, protect from strong winds, water well.

• Hardiness zone

  5-8 USDA

Life cycle

The life of Rhododendron 'Alexander' (often referred to simply as Rhododendron) begins with germination, where seeds require stratification and moisture to sprout. The seedling stage follows, marked by the emergence of the first leaves and root system establishment. As it enters the vegetative growth phase, the plant develops a woody structure and foliage, and it may take several years before it's mature enough to bloom. The flowering stage is characterized by vibrant blooms that typically appear in spring, attracting pollinators. After pollination, the plant produces seed capsules, which eventually dry and release seeds to start a new generation. The plant then enters a phase of senescence as it ages, with a gradual decline in vigor and reproduction until it eventually dies.

Propogation

• Propogation time

  Spring-Early Summer

• The Rhododendron 'Alexander', commonly known as Alexander Rhododendron, is typically propagated through semi-hardwood cuttings. This method is most effective when performed during the late summer, as the plant is beginning to enter dormancy but the new growth has had time to mature slightly. To execute this technique, a cutting of about 4 to 6 inches (10 to 15 cm) is taken from a healthy, disease-free branch. The lower leaves are removed to expose a section of the stem, and the cut is dipped into a rooting hormone to encourage root development. The prepared cutting is then placed into a potting medium that is kept moist and well-drained. Provision of a humid environment, often achieved by covering the pot with a plastic bag or placing it in a propagation chamber, is critical for encouraging root growth. With proper care, roots will typically develop within several weeks, after which the new Alexander Rhododendron plant can be gradually acclimated to less humid conditions and eventually planted out.