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PlantSnap
Plant Care
Red rhododendron
(Rhododendron rubicon)
Also Known As
Red rhododendron, Rubicon rhododendron, Rhododendron
About This Plant
Rhododendron rubicon is a species of flowering plant in the heath family. It is an evergreen shrub that can grow up to 6-8 feet (1.8-2.4 meters) tall and 4-6 feet (1.2-1.8 meters) wide. The plant produces clusters of bright red flowers in the late spring to early summer.
Plant Care Instructions
Outdoor Size Range
6-8 feet (1.8-2.4 meters) tall and 4-6 feet (1.2-1.8 meters) wide
Light Requirements
Rhododendron rubicon prefers partial shade to full sun. It is important to protect the plant from hot afternoon sun.
Humidity Needs
The plant prefers high humidity levels. It can benefit from misting or placing a humidifier nearby.
Fertilizing Schedule
The plant requires regular fertilization during the growing season, using a balanced fertilizer formulated for acid-loving plants.
Pruning Guidelines
Pruning should be done after the plant has finished blooming. Deadheading can encourage the plant to produce more blooms the following year.
Common Pests and Diseases
Common pests for Rhododendron rubicon include lace bugs, spider mites, and scale insects. Diseases that can affect the plant include powdery mildew and root rot.
Indoor Size Range
24-36 inches (60-91 cm)
Watering Schedule
The plant requires regular watering, especially during the summer months. The soil should be kept moist, but not waterlogged.
Temperature Range
Rhododendron rubicon prefers cooler temperatures and can tolerate winter temperatures as low as 0°F (-17.8°C).
Growing Season
The plant blooms in late spring to early summer.
Growing Difficulty Level
Rhododendron rubicon can be moderately difficult to grow. It requires specific soil and environmental conditions to thrive.
USDA Hardiness Zones
Rhododendron rubicon is hardy in USDA zones 6-9.
Did You Know?
Rhododendron rubicon is named after the river Rubicon in Italy, which was famously crossed by Julius Caesar in 49 BC, marking the beginning of the Roman Civil War.
