The Beauty of Full Grown Evergreen Azalea Stewartstonian

Stewartstonian azalea is a stunning evergreen shrub that bursts into color every spring Once established, these mature shrubs put on an eye-catching floral display that stops garden visitors in their tracks. Their versatility also makes Stewartstonian azaleas an excellent choice for gardens large and small. Let’s take a closer look at why this plant is so popular.

An Overview of Stewartstonian Azalea

Stewartstonian azalea (Rhododendron ‘Stewartstonian’) is a broadleaf evergreen shrub in the genus Rhododendron. It is a member of the Gable hybrid azalea group, originally developed by horticulturalist Joseph Gable of Stewartson, Pennsylvania.

This medium-sized plant grows to around 4-5 feet tall and wide at maturity. It has glossy green leaves that take on reddish-brown hues in winter. Bright orange-red blooms cover the shrub in spring, lasting about 2-3 weeks. The flowers have a spicy clove fragrance that perfumes the garden.

Stewartstonian azalea thrives in zones 5-8 It prefers moist, acidic soil and afternoon shade in hot climates Once established, it is fairly drought-tolerant. This azalea blooms on old wood, so prune immediately after flowering.

The Advantages of a Full Grown Specimen

One of the best qualities of Stewartstonian azalea is that it’s slow growing. This means it may take 3-5 years to reach mature size. But once it does, you’ll have a lush, full grown shrub with maximum visual impact.

A mature Stewartstonian azalea will be covered in hundreds of bright reddish-orange blooms in spring. Few other plants can match this saturation of color. The floral display typically lasts 2-3 weeks.

The flowers appear before the leaves emerge, allowing them to really stand out. Plant Stewartstonian azalea next to evergreens like hollies for best contrast.

Full grown Stewartstonian azaleas are dense, rounded shrubs with good foliage coverage. Their glossy green leaves provide interest during the rest of the year. In fall, some leaves may turn reddish-brown for extra color.

Since they bloom on old wood, mature plants produce more flowers each successive year. Proper pruning encourages vigorous new growth that leads to more blooms.

These hardy shrubs are also more drought tolerant when their root systems are well established. Plus, their growth rate slows down dramatically, minimizing maintenance.

How to Grow Strong Stewartstonian Azaleas

Here are some tips for successfully growing Stewartstonian azalea shrubs to maturity:

• Site in part sun or light afternoon shade, especially in southern climates. They need some protection from hot afternoon sun.

• Plant in rich, acidic, moisture-retentive soil. Incorporate organic material like compost or pine needles to improve drainage.

• Water 1 inch per week for the first 2 years, until the roots are established. Then water only during extended droughts.

• Apply an acidic fertilizer annually, and mulch around the base with pine needles or bark chips.

• Prune immediately after flowering by selectively trimming errant branches. Never shear these plants into tight globes.

• Monitor for common azalea pests like lace bugs and caterpillars. Treat with organic methods first before using chemical controls.

Where to Use Full Grown Stewartstonian Azaleas

Here are some ideal uses for showy, full grown Stewartstonian azalea shrubs:

• Plant as a focal point or specimen shrub in the landscape. Allow plenty of space for it to reach its mature size.

• Group multiple azaleas together for a stunning display of spring color. Be sure to leave 3-4 feet between plants.

• Use as an anchor plant in a mixed border or foundation planting. Combine with lower-growing perennials and groundcovers.

• Plant along walkways, entryways or around patios where the floral display can be admired up close.

• Grow in woodland gardens combined with ferns, hostas and other shade-lovers. Stewartsonian azaleas thrive under tall deciduous trees.

• Include in rock gardens, raised planters or containers. Their shallow roots adapt well to restricted spaces.

Caring for a Mature Stewartstonian Azalea

Proper care is crucial to keep a full grown Stewartstonian azalea looking its best year after year:

• Water deeply once a week during drought and extreme heat. Otherwise, mature plants are quite drought-hardy.

• Fertilize in early spring and again after flowering with an acidic formula made for azaleas and rhododendrons.

• Prune only to shape the plant after blooming. Never shear azaleas into tight balls.

• Apply a fresh layer of pine bark mulch around the base each year. This helps retain soil moisture and acidity.

• Monitor regularly for common azalea pests like lace bugs, spider mites and caterpillars. Treat only if an infestation occurs.

• Remove spent flowers promptly before seed pods form. Deadheading prolongs the bloom period.

With the right care, a mature Stewartstonian azalea will thrive for decades, providing gorgeous spring color year after year. If you have the patience to nurture it to full size, this plant will handsomely reward your efforts.