Rose of Sharon (*Hibiscus syriacus*), also called shrub althea, is a large deciduous flowering shrub that can become a small tree. Choose a variety by flower color and form, mature footprint, and whether it may set seed—not by bloom color alone. The 15 options below include compact and upright choices as well as familiar flowering shrubs; they are a documented shortlist, not a ranking.
How to choose a Rose of Sharon variety
Most Rose of Sharon plants are substantial: University of Illinois Extension describes a mature height of 9–12 feet and width of 6–10 feet, while North Carolina State Extension gives 8–12 feet tall by 6–10 feet wide. Cultivar dimensions can differ, so confirm the mature size on the plant tag or with the nursery before deciding where it fits. University of Illinois Extension · North Carolina State Extension
- Match the footprint: Consider compact Pollypetite for limited space or the narrow, upright Pillar series where width is the constraint. Standard selections need room for a large shrub.
- Pick flower color and form: Options span white, pink, red, purple, lavender, and blue, with single, double, or semi-double flowers.
- Check seed behavior: The species can self-sow. A claim of low or no seed set applies to particular cultivars or a grower’s line, not to every Rose of Sharon.
- Check local suitability: Regional hardiness guidance and local concerns about reseeding or invasiveness matter as much as the cultivar name.
15 Rose of Sharon varieties to consider
Flower descriptions below identify the documented distinguishing traits. Exact mature dimensions and seed behavior are not established for every selection; verify both for the specific plant offered locally.
| Variety | Flowers | Habit or size | Landscape fit and seed notes |
|---|---|---|---|
| Aphrodite | Dark pink with a dark red center; also described as rose-colored. | Not stated for this cultivar. | Colorful flowering shrub; cultivar-specific seed behavior not stated. |
| Ardens | Double rosy-purple. | Not stated for this cultivar. | Consider where a double purple bloom is desired; seed behavior not stated. |
| Blue Bird | Sky-blue with a small red center. | Not stated for this cultivar. | For a blue-flowered accent; seed behavior not stated. |
| Diana | Pure white; large flowers are reported to remain open at night. | Not stated for this cultivar. | Virginia Cooperative Extension says its flowers do not produce viable seed; this is a cultivar-specific note. |
| Jeanne d’Arc | Double white. | Not stated for this cultivar. | For a white-flowered shrub; seed behavior not stated. |
| Lucy | Double red. | Not stated for this cultivar. | For a strong red bloom; seed behavior not stated. |
| Red Heart | White with a deep red center. | Not stated for this cultivar. | For a contrasting two-tone flower; seed behavior not stated. |
| Blushing Bride | Double pink flowers that fade to white. | Not stated for this cultivar. | For a soft, changing flower display; seed behavior not stated. |
| Collie Mullens | Semi-double pink with burgundy centers. | Not stated for this cultivar. | For layered pink blooms; seed behavior not stated. |
| Helene | White with a reddish-purple center or base. | Not stated for this cultivar. | For a contrasting flower; seed behavior not stated. |
| Lavender Chiffon | Large lavender flowers. | Rounded habit; North Carolina State Extension lists 8–12 feet tall. | Allow room for a large shrub; width and seed behavior are not stated in the cited cultivar description. |
| Minerva | Lavender-pink with a red eye; described as heavy blooming. | Not stated for this cultivar. | For abundant lavender-pink color; seed behavior not stated. |
| Peppermint Smoothie | Double, ruffled red-pink blooms. | Not stated for this cultivar. | For a ruffled flower form; seed behavior not stated. |
| Pollypetite | Icy lavender. | Compact, round habit; Proven Winners ColorChoice describes it as about 3–4 feet tall and wide. | Useful where a smaller shrub is needed; check the plant tag for the offered plant’s dimensions and seed behavior. |
| Pillar series | Flower color and form depend on the series member. | Narrow and upright; no single series-wide mature dimensions are stated. | Potential fit for a space-saving specimen or flowering hedge. Confirm the exact member and its mature size; seed behavior is not stated here. |
Descriptions and cultivar-specific details are from University of Illinois Extension, North Carolina State Extension, Virginia Cooperative Extension, and Proven Winners ColorChoice.
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- Thrives in USDA zones 5-9
- Mature size 48-72″ W x 96-144″ H
- Deciduous – Foliage loss in winter and new growth early spring
- Full sun to part shade; Blooms spring through fall
- Used in containers, landscapes, and as accents
Where Rose of Sharon grows well
University of Illinois Extension places the species in USDA hardiness zones 5–8 and recommends full sun to partial shade with moist, well-drained soil. North Carolina State Extension gives the same general light and soil guidance. These are species-level recommendations; confirm the hardiness and growing advice for the cultivar and region where you plan to plant it.
Proven Winners describes its own Rose of Sharon line as hardy in zone 5 and heat tolerant through zone 9. That statement concerns its branded selections, not all *Hibiscus syriacus*. Local availability and cultivar performance can vary.
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- Thrives in USDA Zones 5-9
- Grows to mature size 24-36″ W x 120-192″ H
- Full sun to partial shade
- Deciduous – Foliage loss in winter and new growth in spring
- Recommended spacing 24 inches
North Carolina State Extension notes that Rose of Sharon has been considered invasive in some states, including Virginia and Kentucky. Check local guidance before planting, especially if you want to avoid a shrub that may spread by seed.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Prevent unwanted seedlings and maintain flowering
Rose of Sharon can self-sow. The Morton Arboretum advises removing seed capsules after flowering to prevent reseeding. Proven Winners says its line is selected for low to no seed set and identifies Azurri Blue Satin as not producing seedlings; treat that as the grower’s claim about its own selection, not a guarantee for other cultivars or the species.
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- Thrives in USDA zones 5a-9b
- Grows to mature Sizes- 120-192 inches H and 48-60 inches W
- Deciduous – Foliage loss in winter and new growth in spring
- Full sun to part shade; Blooms spring through fall
- Used in containers, landscapes, and as accents
Flowers form on current-year growth. Virginia Cooperative Extension advises: “Blooms occur on current year’s growth, so prune in early spring before new growth starts.” Pruning in early spring can also encourage flowering, according to North Carolina State Extension. Virginia Cooperative Extension notes that flowers may decrease in size if older wood is not pruned regularly. The Morton Arboretum also notes that the plant is late to leaf out in spring, so avoid mistaking a slow start for a dead shrub.
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Sources for cultivar and care details
- University of Illinois Extension: Rose of Sharon, Shrub Althea (*Hibiscus syriacus*)
- North Carolina State Extension: Rose of Sharon
- Proven Winners ColorChoice: Rose of Sharon
- Virginia Cooperative Extension: Rose-of-Sharon, Shrub Althea (*Hibiscus syriacus*)
- The Morton Arboretum: Rose-of-Sharon
- Missouri Botanical Garden: Shrubs and Grasses for Long-season Interest
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