Flame Azalea

Rhododendron calendulaceum

The Flame Azalea (Calendulaceum) is a showy flowering shrub that attracts attention in gardens, especially during the spring. Below is a description of the Flame Azalea's growth characteristics, propagation methods, cultivation methods, garden uses, and important pests and diseases, as well as control methods.

Growth Characteristics
- Height and Width: Mature plants typically grow to 120 cm to 180 cm, though they can rarely reach up to 300 cm.
- Leaves and Flowers: The leaves are oval-shaped, and the flowers are primarily orange or yellow.
- Flowering Period: Blooming occurs from May to June, although the time of full bloom may vary depending on the climate.
- Environmental Requirements: It prefers well-drained acidic soil and can thrive in a variety of environments, ranging from partial shade to full sun. Propagation Methods
- Seed Propagation: Seeds can be sown in the spring after harvesting; cold treatment is recommended to increase germination rates.
- Cuttings: Cuttings can be taken in the summer using semi-hardened branches (semi-hardened leaves).

Cultivation Methods
- Soil Management: Since it thrives in acidic soil, adjust acidity using ferrous sulfate if necessary.
- Watering: Proper moisture management is required, and overwatering should be avoided.
- Fertilization: Periodic supply of organic fertilizer is necessary. Fertilizing twice a year, in spring and autumn, is ideal.

Garden Use
- Due to its showy flowers, it is primarily planted along garden borders or on ridges.
- It can create a colorful landscape by planting it alongside other varieties.

Major Pests and Diseases & Control Methods
- Aphids: Control is achieved using fungicides; starting treatment in early spring is effective.
- Whiteflies: Control is possible by periodically spraying water upon early detection. - Fungal diseases: These can be controlled with dedicated fungicides and proper ventilation.

Flame Rhododendrons are very popular for gardens due to their beautiful flowers and relatively easy care. With proper care tailored to the growing environment and periodic pest and disease control, they can be grown into beautiful and healthy plants.

Plant Type
Plant Family	Rhododendron family
Height	120~240cm
Spread	120~240cm
Colors	red
Bloom Period	May~June
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-25°C

Azalea Mollis
Rhododendron mollis

Azalea oustrinum
Rhododendron austrinum