Swamp Rose Mallow

Hibiscus moscheutos

$18.00 Sold out

1 Gallon | Hardiness Zones 5-9

This common perennial Hibiscus or Marsh Mallow is found in wet areas, including brackish marshes, throughout the eastern U.S. It has relatively large broad and lobed leaves and showy white flowers with a dark center. This species makes a good garden plant and it figures in the parentage of many of the popular hybrids with huge flowers.

Pickup currently unavailable at Aiken Nursery

PLANT DETAILS

Hardiness Zones: 5 - 9

Soil: Well-drained and Moist

Sun: Full Sun and Part Shade

Seasonal Behavior: Dies back, depends on zone

Growth Rate: Fast

Height at Maturity: 6 - 8 Feet

Spread at Maturity: 3 - 5 Feet

Foliage: The leaves are large, heart-shaped, and dark green, providing a lush backdrop to the flowers.

Flowers: Produces huge, showy flowers that can reach up to 12 inches in diameter. The flowers come in various colors, including white, pink, red, and bi-colored, with a distinctive central eye. Blooms appear from mid-summer to early fall, attracting pollinators and adding vibrant color to the garden.

Showy white with red base, summer

Light Requirements: Prefers full sun to partial shade. Hibiscus moscheutos thrives in full sunlight, where it will produce the most abundant flowers. It can tolerate partial shade, but blooming may be reduced. Ensure the plant gets at least 6-8 hours of direct sunlight daily for optimal growth and flowering.

Soil Requirements: Thrives in well-draining, moist to wet soil. Hibiscus moscheutos naturally grows in wetland areas and prefers soil that is consistently moist. It can adapt to a variety of soil types, including loamy, sandy, and clay soils, but performs best in rich, fertile soils with a slightly acidic to neutral pH (6.0-7.5). It is highly tolerant of wet conditions and can even grow in areas with periodic flooding.

Watering: Requires regular watering. Keep the soil consistently moist, especially during the growing season. Hibiscus moscheutos does not tolerate drought well and needs ample water to support its large, showy flowers. Mulching around the base of the plant can help retain moisture and prevent the soil from drying out too quickly.

Temperature and Humidity: Hardy in USDA zones 5-9. Hibiscus moscheutos is well-suited to temperate climates and can withstand cold winters, making it one of the hardiest hibiscus species. It thrives in warm, humid conditions typical of its native range but can also adapt to cooler climates. In areas with harsh winters, the plant dies back to the ground but will regrow from the roots in spring.

Fertilization: Apply a balanced, slow-release fertilizer in early spring to encourage healthy growth and prolific flowering. Fertilizing again in mid-summer can help sustain the plant during its peak blooming period. Organic matter such as compost or well-rotted manure can also be added to improve soil fertility. Avoid excessive fertilization, as this can lead to lush foliage with fewer flowers.

Pruning: Prune in late winter or early spring before new growth begins. Cut back old stems to about 6 inches above the ground to encourage new shoots and maintain a tidy appearance. Deadheading spent flowers can extend the blooming period and keep the plant looking its best. Regular pruning helps promote bushier growth and more abundant flowers.

Pests and Problems: Generally pest-resistant, but may occasionally attract pests like aphids, Japanese beetles, and spider mites. Ensure good air circulation around the plant to prevent fungal diseases such as powdery mildew or leaf spot. If pests or diseases are detected, treat with insecticidal soap, neem oil, or an appropriate fungicide. Regular monitoring and garden hygiene can help keep the plant healthy.

Suitable Environment: Ideal

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