Rhododendron maximum
TAXONOMY
FamilyEricaceae
GenusRhododendron
Zone4
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Rhododendron maximum, commonly known as the Great Laurel or Rosebay Rhododendron, is a species of flowering plant in the family Ericaceae. It is native to the eastern United States, particularly in the Appalachian Mountains. This evergreen shrub can grow up to 15 feet tall and is known for its large, leathery leaves and clusters of pink to white flowers. It has a dormancy period during the winter months.
ALSO KNOWN AS
Great Laurel
Great-Laurel
American rhododendron
Great rhododendron
Rhododendron maximum f. maximum
OVERVIEW
WaterWet
SoilLoamy
LightIndirect Bright (6 Hours)
Temperature18° C
Humidity60%
Dormancy3 Months
pH5.5
Pressure1,013 mbar
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DETAILS
Care Instructions
Rhododendron maximum requires indirect bright light and moderate temperatures. It thrives in high humidity and should be watered regularly to keep the soil evenly moist. Avoid letting the soil dry out completely. This plant prefers cooler temperatures and should be protected from extreme heat.Soil
The Great Laurel prefers well-draining, loamy soil that is rich in organic matter. The soil should be kept consistently moist but not waterlogged. It thrives in acidic soil with a pH around 5.5.Fertilizer
Use a balanced fertilizer with an N-P-K ratio of 10-10-10. Fertilize the plant in early spring and again in late summer. Avoid over-fertilizing, as this can damage the plant.Repotting
Repot Rhododendron maximum every 2-3 years or when it outgrows its container. Choose a pot that is slightly larger than the current one and use a well-draining, acidic potting mix. Repot in early spring before new growth begins.Propagation
Propagate Rhododendron maximum through semi-hardwood cuttings taken in late summer. Dip the cuttings in rooting hormone and plant them in a well-draining, acidic soil mix. Keep the cuttings in a humid environment until they root.Pruning
Prune Rhododendron maximum after it finishes flowering in late spring. Remove dead or diseased branches and shape the plant as needed. Avoid heavy pruning, as this can reduce flowering.Toxicity
Rhododendron maximum is toxic to pets and humans. All parts of the plant contain grayanotoxins, which can cause symptoms such as vomiting, diarrhea, and difficulty breathing if ingested. Keep this plant out of reach of children and pets.REVOLUTIONIZE YOUR PLANT CARE
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