The blue-tinted Rose of Sharon, or Althea, adds striking seasonal color to American gardens. This article features five blue-hued options that thrive in typical U.S. climates, offering ideas for borders, hedges, or focal specimens. Each product is chosen for blue-toned blooms, disease resistance, and adaptability. Explore detailed descriptions, growth expectations, and planting considerations to help pick the right shrub for your landscape.
| Product | Brand | Size / Type | Key Feature |
|---|---|---|---|
| Proven Winners 2 Gal. Blue Chiffon Rose of Sharon | Proven Winner | 2 gal shrub | Blue chiffon flowers, hardy to zones 5-9 |
| Blue Bird Hibiscus | DAS Farms | Live shrub, 1 ft tall (shipped) | Violet-blue blooms, full sun to part sun |
| Brighter Blooms Lavender Rose of Sharon Tree | Brighter Blooms | 4-5 ft tree | Lavender blue-purple blooms, space-saving |
| Brighter Blooms Lavender Rose of Sharon Tree (5-6 ft) | Brighter Blooms | 5-6 ft tree | Lavender blossoms, no shipping to certain states |
| Purple Althea Rose of Sharon Tree Live Plant | DMOH | Quart pot, 1 year old | Deep purple-blue flowers, cold hardy |
Note: All selections are deciduous and will shed leaves in winter, then regrow in spring. Growth expectations vary by variety and climate zone; consult local extension resources for exact timelines and pruning guidance.
Proven Winners Blue Chiffon Rose of Sharon
The Proven Winners Blue Chiffon Rose of Sharon is a 2-gallon shrub designed for zones 5–9, offering a compact width with a tall, airy silhouette. Its blue-hued blossoms appear in midsummer and can extend into early fall. A versatile choice for hedges, borders, or patio plantings, this cultivar emphasizes dependable bloom and a clean, durable habit. Suitable for foundations or mixed borders, it benefits from full sun to partial shade and regular irrigation during establishment.
Key features include a mature width of approximately 48-72 inches and a height of 96-144 inches. The plant is deciduous, so expect foliage loss in winter with fresh growth in spring. For gardeners seeking a blue-toned focal point, Blue Chiffon provides a reliable, ornamental presence that pairs well with other flowering shrubs and perennials.
Blue Bird Hibiscus
The Blue Bird Hibiscus from DAS Farms is described as a live shrub delivered at about one foot tall, ready to plant with included instructions. It is a deciduous plant suited for USDA zones 5–9, thriving in full sun to partial sun. Its signature feature is the rich violet-blue flowers with a dark eye, offering a striking bloom period from late spring through early fall. The plant is typically grown as a hedge, foundation, or specimen and can be pruned for a desired shape as it matures.
Planting considerations include site drainage, sun exposure, and protection from harsh winter winds in colder zones. Expect gradual growth as it establishes, and monitor moisture during warm, dry periods to maintain robust flowering and plant health.
Brighter Blooms Lavender Rose of Sharon Tree (4-5 ft)
The Brighter Blooms Lavender Rose of Sharon Tree is a 4-5 foot specimen designed for tighter spaces while delivering vibrant lavender-blue blooms throughout summer. This tree-like Althea cultivar functions well as a privacy screen, focal point, or entryway accent. It is shipped as a young plant and does not represent a mature mature tree at delivery, allowing for steady, manageable growth in the early years. The plant is typically hardy in zones 5 through 9 and prefers full sun to part shade.
Growth habit is upright with multi-stem possibilities, depending on pruning approach. The plant tolerates a range of soils but benefits from well-drained soil and consistent moisture during establishment. It’s a compelling option for gardeners seeking color without a large footprint.
Brighter Blooms Lavender Rose of Sharon Tree (5-6 ft)
This Brighter Blooms Lavender Rose of Sharon Tree expands to a 5-6 foot height, offering an even more impactful vertical presence while maintaining a relatively narrow footprint. The lavender blooms provide consistent color through the summer months. Some shipments note restrictions to specific states (no shipping to AK, AZ, HI, OR). Plant in full sun to maximize flower production, with good drainage and regular watering during dry spells. The tree form adds architectural interest to gardens, courtyards, and entrances.
Care guidance emphasizes minimal pruning, with selective thinning after peak bloom to sustain vigor and shape. In colder climates, protect new growth during first winters and mulch to conserve moisture and temperature around the root zone.
Purple Althea Rose of Sharon Tree
The Purple Althea Rose of Sharon Tree by DMOH is a one-year-old dormant seedling in a quart pot, marketed as an easy-to-grow option for outdoor planting. It features deep purple-blue blossoms and is advertised as cold hardy, making it suitable for a range of climates. The plant’s shrubby, upright growth habit makes it a good candidate for small-space gardens, entryways, or corner beds where a vertical accent is desired. Expect a period of establishment growth during the first growing seasons with progressive bloom enhancement as roots establish.
Key considerations include sun exposure, soil drainage, and maintenance needs. Regular pruning after bloom can help maintain a strong central leader and balanced form. Given its potential for rapid flowering, ensure consistent moisture during establishment and monitor for any signs of heat stress in very hot climates.
Buying Guide: Key Purchase Considerations
Choosing the right blue-tinted Rose of Sharon shrub depends on space, climate, and aesthetic goals. Consider these perspectives:
- Growth habit and size: Decide between compact shrubs, standard hedges, and tree-form Althea varieties to fit your space and desired canopy height.
- Blue color intensity: Some cultivars offer pale lavender-blue tones, while others showcase deeper violet-blue blooms. Align the bloom color with adjacent plants for contrast or harmony.
- Hardiness and climate: Check USDA zone compatibility. That ensures reliable blooming and winter survivability in your region.
- Sun and soil preferences: Most Althea shrubs prefer full sun to partial shade and well-drained soil. Adjust irrigation to avoid waterlogging during establishment.
- Pruning strategy: Some varieties respond well to light annual pruning to maintain shape, while others benefit from more structured thinning after flowering to encourage vigorous growth.
- Container versus bare-root: If buying smaller plants or containerized options, consider root volume and transplant shock risk when planting in the garden.
- Shipping and regional availability: Some listings restrict delivery to certain states. Plan procurement accordingly to ensure timely planting windows.
Care and Planting Tips Across Blue Rose Of Sharon Varieties
Planting is typically best in spring or fall, allowing roots to establish before extreme temperatures. Water regularly during the first growing season, aiming for deep, infrequent irrigation to encourage drought tolerance. Mulch around the base to preserve moisture and suppress weeds. For taller or tree-form varieties, staking may be useful during establishment to guide upright growth and protect against wind damage. Fertilize sparingly with a balanced mix, avoiding excessive nitrogen that could promote lush foliage at the expense of flower production. Regular monitoring for pests and diseases helps maintain vigorous flowering and overall plant health.
The selections above provide a range of blue and lavender-blue options for different landscape needs. Whether you want a compact foundation shrub, a striking hedge, or a dramatic vertical accent, these blue-tinted Rose of Sharon varieties offer dependable color and garden structure across multiple American regions.