Coelestis Rose of Sharon

As low as $39.59 was $59.99
Availability: In stock

Gorgeous radiant clear and clean blooms, the Coelestis Rose of Sharon (Hibiscus syriacus 'Coelestis') features huge, violet-blue, tropical-looking flowers cover this large vase-shaped shrub starting in mid-summer and continuing on through fall! Not many other flowering shrubs bloom during this time, so get ready for compliments. The flowers themselves are very showy, with deep, heathery blue petals held in an open style. 

Called "single" blooms, this really means Hummingbirds, bees, and butterflies will be coming to your house to party. It's a lot easier for them to drink nectar from open flowers. The color turns scarlet at the throat of the bloom. These vital resources feed your hungry droves all summer and into the fall! Their relaxing, romantic effect is only heightened by the healthy, dark green foliage. It makes a perfect foil for the lush, large blooms with their wide petals and sophisticated color backed by the lush, dark green foliage and airy upright branching.

Also known as Althea and related to the Tropical Hibiscus, the Rose of Sharon naturally grows in a graceful, upright way, you will only rarely have to worry about mundane tasks like pruning! Hardy throughout USDA growing zones 5 to 9, these shrubs grow to an easy-to-manage and alter 8-10 feet in height and 5-6 feet wide.

Planting and Application:

Love summer? If you have a pool, or regularly entertain family and friends in your backyard, take a look at this cool-toned bold cousin to hardy Hibiscus! It's a great way to highlight the season of fun, and you won't need to fuss with it! Add to the delight and get ready to watch the flocks of butterflies arriving to sip nectar! Plant yours near a window or garden bench for easy viewing!

Need a hedge or screen? Coelestis would be wonderful as an informal, super easy-care flowering wall for a garden room, or all along your fence line. Carve out some space in your garden for yourself and create a morning breakfast nook or yoga studio! You'll enjoy the shade and the graceful screening!

Add Coelestis as a flowering specimen and anchor to a foundation planting, or backdrop and accent to Perennial and Cottage gardens, Rose of Sharon are versatile blooming shrubs that love the sun! Pair this fun shrub with Russian Sage to pull in the cool blue. Then, pop-bright Voodoo Sedum along the base as a groundcover. Or, use a single shrub as a beautiful focal point plant outside a kitchen window, or in a courtyard. Gain easy peasy lemon squeezy style for weeks on end!

  • Huge Blue Violet Blooms
  • Graceful, Upright Shrub & Green Foliage
  • Hummingbirds, Pollinators & Butterflies Love the Nectar-Rich Blooms
  • Starts Blooming When Other Shrubs are Done for the Season
  • Stylish Flowering Privacy Hedge, Specimen, Backdrop & Accents

#ProPlantTips for Care:

Althea shrubs and trees perform well in almost any soil, except if it's too dry or too wet. This easy-care plant is a perfect choice, whether you are a beginner or have years of landscaping experience. Rose of Sharon loves sunshine and can tolerate some afternoon shade in warmer climates! Plant it in a spot where they will get at least six hours of sunlight a day for the most flowers. Provide a moderate amount of water on a regular basis. Use a three-inch layer of arborist mulch over the top of the root system to keep them nice and cool.

This pretty shrub blooms on new wood. Prune Althea in early spring to either shape or control the height. You'll have flowers later that season, no matter how tightly you trim them in spring. You can even train these shrubs into small multi or single-stemmed tree forms! Renewal prune every 3-5 years to maintain vigor. Apply a slow-release fertilizer designed for flowering plants at the same time. Follow application rates on the label.

In some regions, Rose of Sharon can have so many seedlings that sprout nearby that they can become a nuisance. Simply deadhead your shrub after flowers fade and remove those seedheads before they mature to combat this.

  • Full Sun & Partial Shade
  • Moderate Moisture & Enriched Well-Drained Soil
  • Rugged, Cold Hardy & Heat Tolerant
  • Tolerates Salt Spray & Deer Seldom Bother It
  • Vigorous & Very Low Maintenance

Cool violet blue mid-season bloomer! You will love the clear and clean lines of the prolific flowers of the gorgeous Coelestis Rose of Sharon shrub! Hurry and order yours today at Nature Hills!

Tree Form vs. Shrub Form

The details make all the difference in a garden. At, we understand that little things like what form a plant is can greatly impact how you plan your landscape. So before you buy, don't forget to check which form you're getting.

Tree Form:

These are plants that have one stem coming from the ground. Plants can also be considered single stem when lower branches are removed to raise the height of the branching to a more desired height. Sometimes, you will hear a tree form referred to as a single stem.

Shrub Form:

These are bushy plants with many stems and branchings close to the ground. They are referred to as shrubs or bushes and are often shorter than their tree forms.

Buying Options for Plants

Nature Hills sells a large variety of plants with several options available. Plants are offered in both potted containers and as dormant bare root without soil. Here is a helpful resource to understand your options as you create a beautiful landscape with help from Nature Hills.

Ever wonder what a larger plant will mean for your landscape? Container Sizes are really all about the age of the plant!

Seasonally, Nature Hills offers hand selected, high quality bare root trees, shrubs and perennials. Bare root plants are sold by height from the top of the root system to the top of the plant. Plants may be taller than the height minimums.

  • Popular sizes of select trees are 1 foot, 2 feet, 3 feet, etc.
  • Popular sizes of select bare root plants is 1 foot, 18 inches, etc.

Nature Hills Container Size by Volume

Keep in mind, specific varieties and different growing conditions can affect the rate at which plants grow. Variations in size may occur.

Young Plants to 18 Months
Size Volume
2"x2"x3" Ranges from .18 to .21 dry quarts / .198 to .23 dry liters in volume
4.5" Container Equal to .65 dry quart / .72 dry liter in volume
Sprinter Pot Equal to .63 dry quart / .69 dry liter in volume
4" Container Ranges from .31 to .87 / .35 to .96 dry liter in volume
6" Container Equal to 1.4 dry quarts / 1.59 dry liters in volume
1 Quart Equal to 1 dry quart / 1.1 dry liter in volume
5.5" Container Equal to 1.89 of a dry quart / 2.08 dry liters in volume
4"x4"x5" Ranges from .8 to 1.1 dry quarts / .88 to 1.2 dry liters in volume
4"x4"x6" Ranges from 1.0 to 1.3 dry quarts / 1.1 to 1.41 dry liters in volume
4"x4"x9" Ranges from 1.1 to 2.1 dry quarts / 1.2 to 2.3 dry liters in volume
4"x4"x10" Ranges from 1.7 to 2.3 dry quart / 1.87 to 2.53 dry liters in volume
Plants 18 Months - 2.5 Years Old
Size Volume
2 Quart Equal to 2 dry quarts / 2.2 dry liters in volume
#1 Container Ranges from 2.26 to 3.73 dry quarts / 2.49 to 4.11 dry liters in volume
5"x5"x12" Equal to 3.5 to 4.3 dry quarts / 3.85 to 4.74 dry liters in volume
Plants 2 - 4 Years Old
Size Volume
#2 Container Ranges from 1.19 to 1.76 dry gallons / 5.24 to 7.75 dry liters in volume
#3 Container Ranges from 2.32 to 2.76 dry gallons / 10.22 to 12.16 dry liters in volume
Plants 3 - 5 Years Old
Size Volume
#5 Container Ranges from 2.92 to 4.62 dry gallons / 12.86 to 20.35 dry liters in volume
#6 Container Ranges from 5.25 to 6.01 dry gallons / 23.12 to 26.42 dry liters in volume
#7 Container Ranges from 5.98 to 6.08 dry gallons / 26.34 to 26.78 dry liters in volume

About Plant Sentry™

Plant Sentry is designed to protect both consumers and the nursery trade from invasive plant pests and diseases. Sites that display the Plant Sentry protection badge are protected from consumers buying and nurseries shipping material carrying invasive pests and diseases.

This proprietary eCommerce software prevents the shipment of a restricted plant to each state. The Plant Sentry system includes a shipment certification program. The Plant Sentry Compliance Officer works closely with and each nursery or fulfillment center to ensure only compliant plants are sold to customers.

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Plant Sentry


To obtain a more accurate shipment time-frame, simply enter your zip code in the “Find Your Growing Zone” box to the right. Our plants are grown all over the country and lead time on items may be different because of this. Once your order is placed, you will also receive the specific shipment time-frame information as part of your order confirmation. Once an item ships, you will receive shipment notification and tracking numbers, so you can follow along while your plant travels to your doorstep. We use FedEx, UPS, or USPS at our discretion.

Due to winter weather we have put a hold on shipping to the areas shown below in grey. You can still order now and we will ship the plant to you during an appropriate time for your zone.

*If you have found your zone already, it will be highlighted in the table below.
Color Zone Times
3 Spring 2019
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Shipping Rates

At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Shipping and handling charges are calculated based on the tables below. Please note that some items include an additional handling surcharge, these will be noted on the item's product page.

From To S&H
0 - 19.99 24.99
20 - 49.99 29.99
50 - 69.99 34.99
70 - 99.99 39.99
100 - 129.99 44.99
130 - 149.99 48.99
150 - 150+ Approx 28%

Click here to see our full rates


Coelestis Rose of Sharon Is Suited to Grow in Zones 5-9
Growing Zones 5-9
More Information
Brand Nature Hills' Choice
Botanical Name Hibiscus syriacus 'Coelestis'
Type Deciduous
Mature Height 8 - 10 feet
Mature Spread 5 - 6 feet
Sun Exposure Full Sun, Partial Shade
Soil Well Drained
Moisture Moderate to Low Once Established
Growth Rate Medium
Flower Color Blue, Violet
Foliage Color Green
Fall Color Yellow
Pollinator Friendly Yes
Pruning Time Early Spring