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Description
Hibiscus Syriacus Red Heart, also known as Rose of Sharon, is a deciduous shrub that belongs to the mallow family. It is native to Asia and produces stunning flowers that bloom from summer to fall. The flowers are large and showy, with a deep red center surrounded by pink to white petals. The plant can grow up to 12 feet tall and 10 feet wide, making it a great choice for hedges or as a specimen plant.
Taxonomic Information
| Domain | Eukarya |
| Kingdom | Plantae |
| Phylum | Angiosperms |
| Class | Eudicots |
| Order | Malvales |
| Family | Malvaceae |
| Genus | Hibiscus |
Appearance
The Hibiscus Syriacus Red Heart shrub has a vase-like shape with multiple branches that grow upright. The leaves are dark green and glossy, with a length of about 3-4 inches. The flowers have a diameter of 4-5 inches and are trumpet-shaped with five petals. The center of the flower is a deep red color, while the petals are pink to white, creating a striking contrast. The plant blooms from summer to early fall, producing flowers that last for several days.
Care Guide
Water
Hibiscus Syriacus Red Heart prefers well-drained soil that is consistently moist. Water the plant deeply once a week, especially during hot and dry weather. Avoid overwatering, as it can lead to root rot.
Fertilization
Fertilize the plant with a balanced, slow-release fertilizer in early spring. Repeat the application every four to six weeks until late summer. Avoid applying fertilizer in the fall or winter, as it can stimulate new growth that is vulnerable to cold temperatures.
Soil
The plant grows best in loamy, well-drained soil that is slightly acidic. If your soil is heavy or clay-like, amend it with organic matter like compost, peat moss, or aged manure.
Sunlight
Hibiscus Syriacus Red Heart requires full sun to partial shade, with at least 6 hours of direct sunlight per day. If the plant is grown in too much shade, it will produce fewer flowers and have a spindly growth habit.
Hardiness Zones
The plant is hardy in USDA zones 5-9, which covers most of the United States. It can tolerate cold temperatures down to -10°F and hot temperatures up to 100°F.
Common Pests & Diseases
Hibiscus Syriacus Red Heart is susceptible to pests like aphids, spider mites, and whiteflies. These pests can be controlled with insecticidal soap or neem oil spray. The plant is also prone to fungal diseases like powdery mildew and leaf spot. These diseases can be prevented by planting the shrub in a well-ventilated area and avoiding overhead watering.
Habitat
Hibiscus Syriacus Red Heart is native to Asia and can be found growing in a variety of habitats, including forest edges, grasslands, and along riverbanks. The plant prefers well-drained soil and full sun to partial shade.
Question and Answer
Q: How often should I prune my Hibiscus Syriacus Red Heart?
A: Prune the plant in late winter or early spring before new growth begins. Remove any dead or diseased wood, and shape the plant as desired.
Q: Can I grow Hibiscus Syriacus Red Heart in a container?
A: Yes, the plant can be grown in a container as long as it is provided with adequate drainage and a nutrient-rich soil mix. Keep the soil consistently moist, but not waterlogged.
Q: How long do the flowers of Hibiscus Syriacus Red Heart last?
A: The flowers can last for several days, but they are most showy on the first day of blooming. Deadhead the spent flowers to encourage more blooms throughout the season.
Q: Can Hibiscus Syriacus Red Heart be propagated from cuttings?
A: Yes, the plant can be propagated from softwood or hardwood cuttings taken in the summer or fall. Dip the cuttings in rooting hormone and plant them in a well-draining soil mix. Keep the soil moist and provide bright, indirect light until the cuttings root.
Related Plants
- Hibiscus Syriacus Blue Chiffon
- Hibiscus Syriacus Lavender Chiffon
- Hibiscus Syriacus White Chiffon
- Hibiscus Syriacus Diana
- Hibiscus Syriacus Pink Giant
References
- “Hibiscus Syriacus ‘Red Heart’” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=287356.
- “Rose of Sharon, Hibiscus Syriacus.” The Spruce, 4 May 2021, www.thespruce.com/hibiscus-syriacus-plant-profile-3269288.
- “Hibiscus Syriacus (Rose of Sharon).” Garden Design, www.gardendesign.com/plants/hibiscus-syriacus.html.
