Rhododendron decorum, the great white rhododendron (Chinese: 大白杜鹃) is a species of flowering plant in the heath family Ericaceae. It is an evergreen shrub native to high forested regions of northern Myanmar and Guizhou, Sichuan, Xizang, and Yunnan, China growing at altitudes of 1,800–4,000 m (5,900–13,100 ft). Depending on the growing environment (either temperate or sub-alpine forest) it can be found as a shrub or small tree of 1–6 m (3.3–19.7 ft), with leathery leaves that are oblong, oblong-ovate or oblong-elliptic in shape and between 5–19 cm in length and 3–11 cm in width. Flowers are borne in trusses, white to pale pink, with a yellow throat, large and very fragrant.It was first described by French botanist Adrien René Franchet in 1886. In cultivation in the UK, Rhododendron decorum has gained the Royal Horticultural Society’s Award of Garden Merit. It is hardy down to −20 °C (−4 °F) but requires a sheltered position and an acid soil that is rich in leaf mould.
Rhododendron decorum shows strong resistance to disease and is generally not prone to illnesses. Regarding care, this plant is fairly low-maintenance. When grown outdoors it needs only minimal watering, and larger specimens usually do not require pruning. Smaller plants, however, should be pruned after they finish blooming. Rhododendron decorumt is appropriate for anyone with outdoor space, such as a garden or a deck, and does not demand much care experience.
How to keep Rhododendron Decorum.
Water
Rhododendron decorum flourishes with moderate moisture and needs to be watered every 1-2 weeks. As an evergreen, it keeps its leaves throughout the year and requires consistent watering, even in winter, unlike many other plants that enter dormancy.
Pruning
Rhododendron decorum showcases beautiful blooms and benefits from being pruned in early spring, before new growth starts. The pruning process involves removing dead or damaged branches, trimming back overgrown areas to improve shape, and promoting healthy growth. Consistent pruning improves air circulation and boosts the plant's overall vigor, ensuring it maintains a robust appearance.
Pot & Repot
When repotting Rhododendron decorum, choose a pot 1–2 inches (2.5–5.1 cm) larger with ample drainage. Use a well-draining potting mix. Repot in spring or fall, making sure the root ball sits slightly lower than the rim of the flower pot. Water thoroughly after repotting and place it in a warm spot with indirect sunlight.
Botanical profile.
- Life Cycle
- Perennial
- Genus
- Rhododendron
- Family
- Ericaceae
- Hardiness Zone
- 2-10
- Mature Height
- 6.1 m
- Mature Spread
- 2.44 m
- Leaf Color
- Green
- Leaf Type
- Evergreen
- Flower Color
- White
