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There's Just Something About a Hardy Hibiscus!

There's Just Something About a Hardy Hibiscus! - Nature Hills Nursery

Charlotte Weidner |

Big tropical blooms and lush greenery. Hardy Hibiscus are cold-tolerant selections of the native Rose Mallow family. They are long-lasting blooms that return every year! Major draws for pollinators and even attracting hummingbirds, the blooms stand out like vivid satellites all summer into fall!

Thriving in the full sun, deer and rabbit-resistant, heat and cold-hardy and highly adaptable, Hibiscus are gorgeous perennials that won’t take much of your time, but give back tenfold! These are low-maintenance and easy-care perennials with massive impact!

All in the Hibiscus Family

There are several types of Hibiscus, from the tropical patio style blossoms to the huge tree-form Hibiscus varieties known as Rose of Sharon. They all share similar blooms and leaves! Big trumpets or open dinner plates of brilliant petals, sometimes with darker colored ‘eyes’ and the tell-tale long spoked stamen that sticks straight out from the center of the bloom. Looking like giant silky satellites.

As lovely as backdrops in the garden bed, anchors and low screening, en masse and in rows to pump up the color and season-long display!

These Mallow family members are even edible! The blooms have been eaten or used as a garnish, eaten and dried for tea. The young shoots and leaves can be cooked and eaten, though they have the mucousy consistency similar to Okra, another Mallow family member, you may even see a similarity to their blooms and seedpods! As always, know what you are working with and if you have any allergies before trying to nibble on any of your landscaping!

Types of Hibiscus

Perennial Hardy Hibiscus

hardy hibiscus

Hardy Hibiscus (Hibiscus moscheutos) is a perennial herbaceous Hibiscus. That means this plant begins to grow from the root each year in late spring. Featuring large flowers all summer and into fall with huge rounded single flowers and many have purplish and red foliage too.

They are usually hardy from zones 4 or 5 through zone 9. In the late fall when exposed to frost the plant is done for the year. The stems, although can seem kind of woody, the plant is still a perennial and will need to be cut to the ground each year and all new shoots arise from the roots each spring.

Tropical Hibiscus

tropical hibiscus

Tropical Hibiscus (Hibiscus rosa-sinensis) is sometimes called Hawaiian Hibiscus or even Chinese Hibiscus. This one is usually used on patios and porches as summer-blooming tropical plants. Some people will then bring them inside before the danger of frost (as they cannot be exposed to freezing temperatures or they will die) and grow them as a houseplant in a sunny window for the winter until they can be moved outside after the danger of frost.

These flowers can be singles or doubles and come in many colors. This is also a tropical plant used outdoors in tropical climates where it will not freeze.

Rose of Sharon Hibiscus Shrubs

rose of sharon

Rose of Sharon Hibiscus (Hibiscus syriacus) Shrub-Form is a woody shrub generally hardy zone 5 through 9. It is a deciduous shrub that in the fall, the leaves turn yellow and brown and drop off the plant. They are fairly large shrubs, especially in the warmer zones and not overly aggressive in the coldest zone because they can die back. The flowers can be single or very double almost like a carnation flower.

This shrub form plant blooms late summer into fall and the bloom is profuse. The newer cultivars are sterile or non-invasive, and some of the older ones can re-seed producing new seedlings near the plant. Flowers come in pinks, white, blue and purple. Flowers are produced on new growth so they can be pruned in early spring to reduce size or renewal prune.

Rose of Sharon Hibiscus Tree-Form

Rose of Sharon Hibiscus (Hibiscus syriacus) Tree-Form is the same woody deciduous plant as above but trained as a single stem (trunk) coming from the ground as a tree-form plant that stays a smaller ornamental tree with many flowers late summer into fall. Hardy in zones 5-9.

Nature Hills Nursery Top 5 Hardy Hibiscus Shrubs

#5 Hollywood™ Tropical Hibiscus Chatty Cathy™

Brilliant sunshine lemon yellow petals and anther of these trumpet-shaped blossoms are highlighted by an incredibly hot pink to scarlet red eye and cute red fuzzy stigma.

#4 Hardy Perennial Hibiscus Cherry Choco Latte

Cherry Chocco Latte Hardy Hibiscus

Gorgeous bright pink blooms and a deep magenta eye that radiates out into the veins and heavily streaks each petal. Backed by dramatically dark blackish-green foliage, each of the nearly foot-wide blooms completely covers this entire shrub!

#3 Luna Perennial Hibiscus

Red, Pink, White and rosy-Magenta, The huge blooms of the Luna are enormous whorled satellites of highly saturated color! With brilliant red centers and long yellow stamen sticking out from the center. The small, compact plants become covered in long-lasting blooms all summer.

#2 Head Over Heels® Perennial Hibiscus

head over heels perennials hibiscus

The incredibly dark foliage that’s near black, dark-purplish and deep red becomes a dramatic backdrop to the large wide-open trumpet-shaped blooms. Two varieties are available, Blush is a lovely pink with a dark red eye and Passion is brilliant hot pink, both stand out against the dark foliage.

#1 Cranberry Crush Perennial Hibiscus

The number one spot goes to the glorious red blooms of Cranberry Crush Hibiscus! With petals so large they overlap, these enormous, vividly hued blossoms grow on a compact green-leafed shrub. These are highly disease-resistant, salt, sun and soil type tolerant perennial shrubs!

Very hardy plants, both deer and rabbits tend to leave them alone but they draw pollinators and hummingbirds in droves! There’s not much more you can ask for in a low-maintenance landscape plant!

Nature Hills Top 5 Tree-Form Hibiscus Picks

#5 Smoothie® Hardy Rose of Sharon

smoothie hardy rose of sharon

The Smoothie® Line of Rose of Sharon tree-form is a Hibsicus family member with incredible double blooms full of ruffled petals in saturated color through and through. Available in double Blueberry and Raspberry hues, these solid-colored flowers are backed by handsome green foliage.

#4 Satin Rose of Sharon Tree-Form

Available in deeply saturated Rose, Azurri lavender-Blue, rosy-Violet, pale Orchid, and deep Purple blooms with silky petals all have a brilliant red eye! Backed by lush foliage these are very hardy and adaptable shrubs.

#3 Ruffled Satin® Rose of Sharon Tree-Form

Ruffled Satin Rose of Sharon Tree

Brilliant rosy pink with a bright red eye, these ruffled whorled blossoms bloom from Summer through autumn, tolerate humidity, soil types, salt, and are more columnar for tight spaces!

#2 Blushing Bride Rose of Sharon Tree-Form

Upright growing, compact and great for tight spaces, the columnar Blushing Bride is a double pale pink blossom with rosy red centers that attract pollinators and hummingbirds galore!

#1 Chiffon® Rose of Sharon Trees

Lavender, White, Pink, and Blue Chiffon, this line of nearly double blooms are pure color through and through. The big fluffy petals, stamen and lacking a colorful eye, Chiffon® Hardy Hibiscus are one solid saturated hue inside and out!

The Choice is Yours!

Chiffon Rose of Sharon

With so many choices available for you at Nature Hills, you’ll certainly be able to find the Hardy Perennial Hibiscus perfect for you and your landscape! From the tallest Purple Pillar® Rose of Sharon or Red Heart Rose of Sharon Shrub, to the smallest Lil' Kim® Rose of Sharon and Hibiscus Luna White. Plus a wide range of incredibly cold-hardy varieties and heat tolerant types.

Check out all these incredible tropical blooms for your landscape today, regardless of how cold your winters are, you’ll enjoy exotic blooms and long-lasting color with ease!

Happy Planting!

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Frequently Asked Questions

What USDA hardiness zones are best for growing hardy hibiscus successfully?

Hardy hibiscus thrives in USDA hardiness zones 4-9, with some varieties surviving in zone 3 with proper winter protection. These perennial hibiscus can tolerate winter temperatures down to -20°F to -30°F once established. In zones 4-5, apply a 4-6 inch layer of mulch around the base in late fall and cut stems back to 4-6 inches after the first hard frost. Choose varieties specifically bred for cold tolerance if you're gardening in zones 4-5 for the best success.

What should I expect from hardy hibiscus plants left in the garden over winter?

Hardy hibiscus are herbaceous perennials that die back to the ground each winter, then regrow from their roots in late spring when soil temperatures warm. Unlike tropical hibiscus, these cold-hardy varieties can survive freezing temperatures in most growing zones and will return reliably each year. The plants may appear completely dead through winter and spring, emerging later than most perennials around May or June. Wait until you see new growth before cutting back the old stems, as premature pruning can damage the crown.

How long does it take for hardy hibiscus grown from seeds to germinate and bloom?

Hardy hibiscus seeds typically germinate within 14-21 days when planted in warm soil (70-75°F) after the last frost date. Plants grown from seed usually won't bloom until their second year, as they need time to establish strong root systems. For faster results, consider starting seeds indoors 6-8 weeks before your last frost date or purchasing established plants for same-season blooms.

Should I cut back hardy hibiscus as it grows if it's taking over the entryway, or use a trellis?

You can cut back hardy hibiscus by up to one-third during the growing season without harming the plant, though this may delay blooming by 2-3 weeks. Since hardy hibiscus are herbaceous perennials that die back to the ground each winter, they don't require trellising like vines. For entryway management, prune in late spring when shoots reach 12-18 inches tall, or select more compact varieties like 'Luna' series that stay under 4 feet. Cut back selectively rather than shearing to maintain the natural shape and flowering potential.

How can I tell if my hibiscus is a hardy variety?

Hardy hibiscus (Hibiscus moscheutos) are herbaceous perennials that die back to the ground each winter and emerge from the roots in late spring, unlike tropical hibiscus which are evergreen shrubs. Hardy varieties typically survive in zones 4-9, produce massive 6-12 inch blooms, and often feature thick, sturdy stems with heart-shaped leaves. If your hibiscus completely dies back in winter but returns from the base each spring with enormous dinner plate-sized flowers, it's likely a hardy variety. Check your plant tag or contact your local nursery to confirm the specific variety and cold hardiness for your zone.

Why is my hardy hibiscus so late to emerge in spring, and should I worry it's dead?

Hardy hibiscus are notoriously late emergers, often not showing new growth until soil temperatures consistently reach 65-70°F in late spring or early summer. As herbaceous perennials, they die back completely to the ground each winter and regrow from their root system, which naturally takes longer than shrubs that retain their woody structure. In zones 4-9, it's completely normal for hardy hibiscus to remain dormant until May or even June, well after other perennials have leafed out. Wait until late June before assuming your plant is dead, and gently scratch the base of old stems to check for green tissue underneath the bark.

Do hardy hibiscus produce seeds, and how long do they take to germinate?

Yes, hardy hibiscus produce large seed pods after flowering, typically maturing in late fall. Seeds germinate in 14-21 days when started indoors at 70-75°F in late winter, but may take longer with outdoor direct sowing in spring. For best results, nick the hard seed coat with a file and soak seeds overnight before planting in well-draining soil.

How do I dig up and transplant hardy hibiscus from the ground to send to someone?

The best time to transplant hardy hibiscus is in early spring before new growth emerges, or in fall after the plant goes dormant. Dig a wide circle at least 18-24 inches from the stem to preserve the root system, going down 12-18 inches deep since these perennials have substantial root structures. Wrap the root ball in damp burlap or plastic and ship immediately, as hibiscus roots are sensitive to drying out. Plant the transplant at the same depth it was growing originally and water thoroughly to establish it in its new location.

What are the best planting spots for new, earlier-flowering hardy hibiscus varieties?

Hardy hibiscus thrive in full sun locations with well-draining soil, performing best in USDA zones 4-9. Plant them in spots that receive at least 6-8 hours of direct sunlight daily, spacing them 3-4 feet apart to allow for their mature spread of 3-6 feet. Earlier-flowering varieties benefit from southern or western exposures that warm up quickly in spring, helping trigger their late spring emergence. Choose locations protected from strong winds to prevent damage to their large blooms and provide consistent moisture during their growing season.

How do I prune and care for a scraggly, thin hardy hibiscus that's growing oddly and seeking sun?

Hardy hibiscus naturally dies back to the ground each winter and emerges late in spring from the roots, so thin growth may simply indicate it's still establishing or needs more sunlight. If your plant is reaching or leaning toward sun, relocate it to a full sun location (6+ hours direct sunlight) during dormancy in late fall through early spring. In late winter or early spring before new growth appears, cut all stems down to 4-6 inches above ground level. Ensure consistent moisture and apply balanced fertilizer in spring to encourage robust new growth.

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