9 Best Full-Sun Flowering Perennials for Southern Gardens

It takes a very special plant to withstand the brutality of the South. Oppressive, sustained heat, punishing sun, lack of rain — it’s a wonder anything can stand up to these conditions.

Vertical closeup of a pink pavonia flower with five petals and a white and yellow stamen in the center similar to that of a hibiscus, growing in the sunshine with green foliage in the background.
Photo by Gretchen Heber.

But fear not, for Mother Nature provides. She has given the Southern gardener a plethora of spectacular landscape choices that withstand brutal conditions in sparkling fashion.

Vertical image of a large trumpet vine, with red and orange flowers, and dark green leaves, growing next to a white fence with a blue sky and white clouds in the background.

Here are our Top 9 picks for full sun plants for Southern gardens:

Best Plants for Full-Sun Southern Gardens

  1. Bulbine
  2. Coneflower
  3. Cosmos
  4. Lantana
  5. Pavonia
  6. Salvia
  7. Trumpet Vine
  8. Verbena
  9. Yarrow

1. Bulbine (Zones 8-11)

Yellow and orange bulbine flowers, growing on long, skinny stalks with green grasslike leaves, in a garden bed topped with brown wood mulch, with grass and trees, and a potted plant, in the background.
Photo by Gretchen Heber.

Be still my heart. How I love you, bulbine — your tall, slender, onion-like leaves, your succulent-ish self with your long, elegant, and intricate yellow or orange flower spikes!

Bulbine frutescens is a perennial, but it has trouble withstanding anything more than a light frost. While my love is endearing, I am occasionally heartbroken when the odd deep freeze in my zone 8b Austin steals my dear bulbine away.

Bulbine Live Plants, available on Amazon

But so lovely is it that, come springtime, I happily the trek to the nursery for new loves to replace the old.

Like the other plants on our list, bulbine is heat and drought tolerant, basking in the sun for hours with nary a complaint. Its clumping form gets about 18 inches tall and can spread to about 3 feet.

Whether you get rain only every few weeks or enjoy a daily afternoon sprinkle, bulbine will still perform beautifully. It will even tolerate a little shade, though bloom production may be reduced.

2. Coneflower (Zones 3-9)

Two purple coneflowers with yellow centers, being pollinated by a bee and a hummingbird.

This is another one we’ve delved into thoroughly, in this article.

But let’s have another quick look at coneflower (Echinacea), to refresh our heat-addled memories:

Purple Coneflower Seeds, available on Amazon

Native to the North American plains, many varieties of plant have found a beloved home in America’s more southern climes, where they withstand sun and heat with aplomb.

Purple coneflower, in particular, stands up to Southern sun the way a duck feather withstands water. And speaking of water, puh-lease. Southern coneflowers are the camels of the garden, able to go long spells without a drink.

Masses of large, daisy-like flowers top tall stems that typically reach about 18 inches.

Questions? Lean more about growing coneflower and Echinacea.

3. Cosmos (Zone 3-10)

Closeup of pink and white cosmos growing in a sunny meadow.

Another hardy summer performer, cosmos delight with masses of colorful flowers in a wide range of hues well into fall.

Hot, dry conditions are best for this beauty, and they can be grown as perennials in zones 9 and 10. Don’t try to spoil them with special soil — it’s not their thing, and they often thrive on neglect. Avoid overwatering them as well.

‘Gloria’ Cosmos Seeds, available on Amazon

They look best in mass plantings, and they’re usually started from seeds, though you may find starts at a nursery.

Dwarf varieties do nicely in containers, and keep in mind that cosmos of all types reseed generously.

Cosmos makes a nice cut flower for arrangements, too.

Learn more about growing cosmos here.

4. Lantana (Zones 3-11)

Vertical image of yellow lantana flowers, with clusters of blooms at the top of long stems with green leaves, growing in brown soil with a large gray rock.
Photo by Gretchen Heber.

Considered an invasive pest by some, lantana is nonetheless a go-to space filler for Southern gardeners looking for something that can withstand punishing heat.

Sprawling, shrubby plants, they are characterized by their attractive clusters of flowers in a variety of colors, including, yellow, purple, pink, white, and red. In fact, with more than 150 cultivars to choose from, it’s easy to find one that will fit your palette.

'Bandana Cherry' Lantana flowers, pink and yellow, with green leaves.

‘Bandana Cherry’ Lantana, available from Nature Hills

In Austin, my lantanas go to the ground over winter and come roaring back in mid-spring. Further south, they will remain evergreen. Annual plants in USDA Hardiness Zones 3-8, they can be grown as perennials in zones 9-11.

These durable plants thrive in the sun, and are drought tolerant. They can go weeks without supplemental watering, continuing to display their cheerful blooms the whole time.

5. Pavonia (Zones 8-11)

Pink five-petaled pavonia flowers, similar in appearance to hibiscus, with green leaves.
Photo by Gretchen Heber.

Commonly called pavonia or rock rose, Pavonia lasiopetala is happy to produce masses of sweet and simple bright pink flowers all summer long.

Each flower lasts just a day, but there are always plenty more on deck, ready to take over. Similar in appearance to hibiscus, it comes from the same plant family but is native to North America.

This perennial shrub is woody at its base and herbaceous up top, growing to 2 to 4 feet tall and about as wide.

A large pavonia plant with pink flowers and green folage, growing next to a white pathway in the garden.
Photo by Gretchen Heber.

Tough as a hungry hyena, rock rose withstands intense sun, drought, and general neglect. Ours get no supplemental water and no fertilizer, and yet they reward copiously with lovely little flowers.

Keep pavonia compact and leafy with frequent prunings; its naturally loose, open-branched form can get leggy and punctuated by deadwood without some occasional snips here and there.

While a plant may live only three to six years, it happily reseeds itself quite liberally, so once established, there’s no need to fear a shortage of rock rose.

6. Salvia (Zones 3-11)

Pale purple salvia flowers, with green foliage in soft focus in the background.

We gave you a full report on this heat-tolerant beauty in this article, but here’s a quick reminder of why this plant should be in every Southern garden:

Let’s start with the fact that it’s just beautiful. With flowers in a multitude of colors, and blooms that just don’t quit from spring to fall, salvia is a reliable, months-long performer. And the blooms are excellent for attracting pollinators, like butterflies and hummingbirds.

Closeup of purple 'Evolution' salvia, with yellow coreopsis in the background.

S. farinacea ‘Evolution,’ available from Nature Hills Nursery

Now, it’s important that you select the right cultivar for your area and growing conditions. In a testament to its versatility, salvia includes some types that prefer shade, and others that are happy in a full-sun blast furnace.

Some can take the drought conditions of Texas while others appreciate the daily sprinklings common to other areas of the South.

And there are also varieties will remain evergreen over winter, while others will die back and flourish again come springtime.

7. Trumpet Vine (Zones 4-9)

Closeup of a cluster of red trumpet creeper flowers with light green leaves, growing in bright sunshine.

If you’re looking for a full sun, heat-tolerant, drought-tolerant, flowering vine, consider trumpet vine, also known as trumpet creeper (Campsis radicans).

Often confused with honeysuckle by non-gardeners, trumpet creepers are native to the southeastern United States, it can grow to a total height of 25-40 feet, with a spread of 5-10 feet for each vine.

This plant isn’t picky about soil types, doesn’t need to be fertilized, and while it does fine with little water, it’s happy in areas that are soggier, too. The trumpet-shaped blossoms are excellent for attracting hummingbirds.

After its bloom period, it goes into overdrive growth mode, covering fences and trellises quickly. Since these vines can grow to be so big and spread so eagerly, be sure to provide them with a sturdy structure to grow on.

Closeup of red-orange four-petaled red trumpet creeper flowers, with green leaves growing on vines.

Bare Root Trumpet Creeper Plants, available from Nature Hills

Flowers blooms on new growth. Incidentally, this plant will do okay in partial shade, though it won’t produce as many flowers as it will in full sun.

Prune at will if it gets carried away with its rather aggressive growth habit.

8. Verbena (Zones 7-11)

White garden verbena flowers growing in several clusters on a plant with green leaves, planted in brown soil topped with mulch.

In the same family as lantana, this flowering groundcover is equally tough, refusing to cave in even the most brutal summer conditions. In fact, verbena really must have eight to 10 hours of full sun each day to do well.

This plant is happy in ordinary soil, as long as it is well-draining. The plant does appreciate a monthly application of a slow-release, complete fertilizer such as 19-5-9.

Closeup of many small purple verbena 'Superbena Dark Blue' flowers.

Verbena ‘Superbena Dark Blue,’ available from Nature Hills

Like its cousin, verbena blooms seemingly endlessly in a rainbow of colors, especially if given a haircut two or three times each season, including a fall cut back.

Sprawling to 4 feet but only getting 8 to 10 inches tall, verbena also makes an attractive container plant.

Find out more about verbena now!

9. Yarrow (Zones 3-9)

Closeup of one large and three smaller clusters of tiny yellow yarrow flowers, growing on long stems with narrow gray-green foliage, with a gravel path beneath the plants.

I remember being tickled a few years back when I was helping my Aunt Karen make floral arrangements for my cousin’s wedding. One of the flowers she had purchased at a flower market in downtown Denver was yarrow (Achillea millefolium).

“I grow these in my garden at home in Austin!” I joyously exclaimed, happy to recognize one of the blooms among the many unfamiliar blossoms more typical of flower arrangements.

Closeup of the delicate yellow flowers and dark green foliage of 'Moonshine' yarrow.

Yarrow ‘Moonshine,’ available from Nature Hills

A perennial, yarrow begins its long bloom period in late spring, after reaching heights of 2 to 4 feet. Its tiny yellow, pink, red, or white flowers form attractive clusters atop stalks with feathery leaves.

Closeup of tiny five-petaled red 'Paprika' yarrow flowers, with yellow center, growing on gray-green foliage.

Yarrow ‘Paprika,’ available from Nature Hills

And while yarrow will take all the heat and sun Southern gardens must withstand, keep in mind that this plant can take two years to become fully established and start blooming. Don’t expect much from it in its first year, but revel in its beauty once it’s firmly a part of your landscape.

Still have questions? Read our detailed guide to growing yarrow.

Tough Beauties

Southerners, is your spade itching? If you don’t have every one of these beauties in your landscape, get them ordered and start planning where you’ll plant them.

A cluster of pink and yellow lantana flowers, with dark green leaves.
Photo by Gretchen Heber.

No wimpy, melting, water-hogging pansies for us, thank you. We need plants that face the sun, heat, and drought with an emphatic, “Bring it on!”

Do you agree with our list? It’s a bit Texas-heavy, of course, so if you’re a Southerner, please share other favorites in the comments section below.

Photos by Gretchen Heber © Ask the Experts, LLC. ALL RIGHTS RESERVED. See our TOS for more details. Product photos via The Clayton Farm, Outsidepride, Proven Winners, David’s Garden Seeds, Nature Hills Nursery, and Everwilde Farms. Uncredited photos: Shutterstock. With additional writing and editing by Allison Sidhu.

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About Gretchen Heber

A former garden editor for a daily newspaper in Austin, Texas, Gretchen Heber goes through entirely too many pruners and garden gloves in a year’s time. She’s never met a succulent she didn’t like and gets really irritated every 3-4 years when Austin actually has a freeze cold enough to kill them. To Gretchen, nothing is more rewarding than a quick dash to the garden to pluck herbs to season the evening meal. And it’s definitely time for a happy dance when she’s able to beat the squirrels to the peaches, figs, or loquats.

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