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Description
Rhododendron Susan, also known as Azalea Susan, is a deciduous shrub that belongs to the Ericaceae family. It is a hybrid between Rhododendron austrinum and Rhododendron canescens. This plant is native to North America and is mostly found in the southern states. Rhododendron Susan is prized for its beautiful, fragrant flowers that bloom in spring.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Ericales |
| Family | Ericaceae |
| Genus | Rhododendron |
Appearance
Rhododendron Susan can grow up to 8 feet in height and 6 feet in width. Its leaves are green and glossy, and can be up to 5 inches long. The flowers of Rhododendron Susan are funnel-shaped and can be up to 2 inches in diameter. They come in shades of pink, orange, and yellow, and have a sweet fragrance.
Care Guide
Water
Rhododendron Susan requires regular watering, especially during the growing season. It is important to keep the soil moist but not waterlogged. Water deeply once a week or more frequently during hot and dry weather.
Fertilization
Rhododendron Susan requires a balanced fertilizer that is high in phosphorus. Fertilize in early spring before new growth appears, and again in early summer. Avoid fertilizing in late summer and fall as this can promote new growth that may not harden off before winter.
Soil
Rhododendron Susan prefers acidic soil with a pH between 4.5 and 6.0. It is important to amend the soil with organic matter such as compost or peat moss to improve drainage and aeration.
Sunlight
Rhododendron Susan prefers partial shade to full sun. Too much sun can scorch the leaves and flowers, while too much shade can lead to poor growth and fewer blooms.
Hardiness Zones
Rhododendron Susan is hardy in USDA zones 6 to 9.
Common Pests and Diseases
Rhododendron Susan is susceptible to several pests and diseases, including lace bugs, spider mites, and fungal leaf spots. To prevent these problems, it is important to maintain good cultural practices such as proper watering, fertilization, and pruning. If necessary, use insecticides or fungicides according to the label instructions.
Habitat
Rhododendron Susan is native to North America and is mostly found in the southern states. It grows in a variety of habitats, including woodlands, swamps, and bogs.
Question and Answer
Q: How often should I water Rhododendron Susan?
A: Rhododendron Susan requires regular watering, especially during the growing season. Water deeply once a week or more frequently during hot and dry weather.
Q: What is the ideal soil pH for Rhododendron Susan?
A: Rhododendron Susan prefers acidic soil with a pH between 4.5 and 6.0.
Q: What are the common pests and diseases of Rhododendron Susan?
A: Rhododendron Susan is susceptible to lace bugs, spider mites, and fungal leaf spots.
Q: What is the hardiness zone for Rhododendron Susan?
A: Rhododendron Susan is hardy in USDA zones 6 to 9.
Related Plants
- Rhododendron austrinum
- Rhododendron canescens
- Rhododendron flammeum
- Rhododendron viscosum
References
- “Rhododendron Susan.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=c121.
- “Rhododendron Susan.” American Rhododendron Society, www.rhododendron.org/descriptionH_new.asp?ID=424.
- “Rhododendron Susan.” Fine Gardening, www.finegardening.com/plant/rhododendron-susan.
