Rose of Sharon Seeds – 10 Hibiscus syriacus Shrub Althea Hardy Hibiscus

Rose of Sharon (Hibiscus syriacus), also known as Shrub Althea, is a deciduous flowering shrub prized for its showy, hollyhock-like blooms that appear in mid-to-late summer when many other shrubs have finished flowering. The flowers attract pollinators and come in a range of colors, making this an excellent choice for mixed borders, hedges, and wildlife gardens.

This listing offers 10 seeds of Hibiscus syriacus, a hardy species that tolerates a variety of soil conditions and is relatively low-maintenance once established. With its upright habit and abundant blooms, Rose of Sharon adds vertical interest and late-season color to the landscape.

Plant Features

• Showy, five-petaled flowers with prominent stamens
• Blooms in mid-to-late summer
• Attracts butterflies and hummingbirds
• Deciduous shrub with upright growth habit
• Tolerates a range of soil types and urban conditions

Growing Information

• Botanical Name: Hibiscus syriacus
• Plant Type: Deciduous flowering shrub
• Sunlight: Full sun to partial shade
• Soil: Well-drained, average to moist soil
• Water Requirements: Moderate; water regularly during establishment
• Growth Habit: Upright, vase-shaped
• USDA Hardiness Zones: 5–9
• Bloom Season: Summer
• Mature Height: 8–12 feet
• Spacing: 6–10 feet apart

Planting & Care

Sow Rose of Sharon seeds indoors 6–8 weeks before the last frost. Scarify seeds by nicking the hard coat or soaking in warm water for 24 hours to improve germination. Press seeds into a moist, well-draining seed-starting mix, barely covering them. Keep at 70–75°F (21–24°C) and maintain consistent moisture until germination, which can take 3–4 weeks or longer. Provide bright light after seedlings emerge.

Once seedlings have several true leaves and danger of frost has passed, harden them off and transplant outdoors in a sunny location with well-drained soil. Water regularly during the first growing season to help establish a deep root system. Rose of Sharon is adaptable but performs best with consistent moisture and occasional pruning to maintain shape and encourage vigorous blooming.

What's Included

10 Rose of Sharon (Hibiscus syriacus) seeds.