Historyland Nursery

Interesting Notes:

The kaempferi is a native of Japan and is known as Torch Azalea for its brilliant color.  First introduced in 1892 the kaempferi was used for many new hybrids.  The Johanna is cold hardy and semi-evergreen usually taller than broad. 

Azalea Growing and Maintenance Tips

 

 

Light Requirements:

· Prefers partial to full shade but can tolerate some morning sun. Avoid planting in areas with full afternoon sun, as this may lead to leaf scorch.

· Best grown under dappled sunlight or in locations with protection from the hottest part of the day.

 

Soil Requirements:

· Thrives in well-draining, acidic soil (pH 4.5-6.0).

· Amend soil with peat moss, pine bark, or compost if necessary to ensure proper acidity and drainage.

 

Watering:

· Water consistently to maintain moisture in the soil, particularly during dry spells. Ensure the soil is evenly moist but not waterlogged.

· Azaleas have shallow roots, so water deeply to encourage strong root development, but avoid overwatering.

 

Fertilization:

· Apply a slow-release, balanced fertilizer designed for acid-loving plants in early spring before blooming.

· Avoid high-nitrogen fertilizers as they promote excessive foliage growth rather than flowering.

 

Pruning:

· Prune lightly after flowering to remove dead or damaged branches and to maintain a tidy shape.

· Avoid heavy pruning, as it can limit next season's blooms. Deadheading spent flowers encourages more growth and enhances aesthetics.

 

Mulching:

· Apply a 2-3 inch layer of mulch (such as pine needles, bark, or wood chips) around the base to retain moisture and regulate soil temperature.

· Keep mulch away from the crown of the plant to prevent rot.

 

Winter Care:

· Mulch the base and, in colder climates, consider burlap wrapping to protect from extreme winter winds.

· Ensure proper drainage to avoid root rot during winter months.

 

Pest and Disease Management:

· Check regularly for aphids, lace bugs, and spider mites, which may affect the plant. Treat with insecticidal soap or neem oil as needed.

· Fungal diseases such as powdery mildew and root rot can be a problem. Good spacing and air circulation help prevent these.

 

Click HERE for Planting Instructions.

Azalea kaempferi 'Johanna' Characteristics

Genus Overview: Azalea

Common Name: Azalea

The Azalea is among the showiest of all shrubs when in flower. Being evergreen to semi-evergreen it gives your garden a well finished appearance even in winter. The azalea is a member of the rhododendron family and requires basically the same care as the rhododendron. They begin blooming from mid-March to early May and are prized for their vibrant colors and fine textured foliage. Azaleas can be planted in full sun or partial shade; however, it is best not to plant them where temperatures get too hot. This versatile shrub can be used in many aspects of the landscape. All require slightly acid loamy soil with adequate drainage. When planting be sure to plant 1/2” above the ground level, amend the soil only when necessary and mulched to help retain water and insure their survival. Growth habit varies from 2’ to 8’ with equal spread depending on the variety.