6 Best Pergola Morning Glories For Quick Cover That Won’t Take Over

Morning glories get a bad rap, and sometimes it’s deserved. Plant the wrong one, and you’ll spend the next decade fighting it back from your siding, your gutters, and every other plant in the garden. But choose the right annual variety, and you get a stunning, fast-growing screen for your pergola that dies back with the first frost. The key is knowing which ones give you that lush summer cover without the long-term headache.

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Choosing Morning Glories That Won’t Take Over

The fear of a morning glory takeover comes from confusing vigorous annuals with truly invasive perennials. The real monster is field bindweed (Convolvulus arvensis), a deep-rooted perennial that is nearly impossible to eradicate. The varieties we’re talking about here are mostly Ipomoea purpurea or Ipomoea tricolor—annuals that complete their entire life cycle in one season.

They grow fast, and that’s the point. You want quick cover for a hot, sunny pergola. The trick is managing their tendency to self-seed. An annual that drops a thousand seeds can feel just as invasive as a perennial if you let it.

Your control point is at the end of the season. By planting known annual varieties from seed packets and committing to a thorough fall cleanup, you hold all the cards. You get the beautiful vining cover you want for three or four months, and then you pull it down. It’s a simple, effective contract with the plant.

‘Heavenly Blue’: The Classic Sky-Blue Climber

When you picture a morning glory, you’re probably picturing ‘Heavenly Blue’. Its flowers are a perfect, clear sky-blue with a soft yellow and white throat. They are breathtaking when they unfurl in the early morning light, and they create a classic, timeless look on any structure.

This is an Ipomoea tricolor variety, which means it’s a workhorse. It will easily climb 10 to 15 feet in a season, making it ideal for covering a standard-sized pergola quickly and completely. Its heart-shaped leaves create a dense canopy, offering real shade by mid-summer. Just give it something to twine around, and it will do the rest of the work for you.

‘Grandpa Ott’s’: A Deep Purple Heirloom Vine

‘Grandpa Ott’s’ is an heirloom with a great story and even better performance. The flowers are a stunning, deep royal purple with a bright reddish-pink star in the center. This variety brings a richness and depth of color that contrasts beautifully with green foliage.

As an Ipomoea purpurea, it’s a slightly more restrained grower than ‘Heavenly Blue’, typically reaching 8 to 10 feet. This makes it a fantastic choice for smaller pergolas or for gardeners who want lush cover without quite so much vigor. Be aware that it is a prolific self-seeder, so end-of-season cleanup is non-negotiable if you want to keep it contained to one spot.

‘Scarlett O’Hara’: Vibrant Red Japanese Variety

Finding a true, vibrant red in a morning glory can be tough, but ‘Scarlett O’Hara’ delivers. This Ipomoea nil variety boasts brilliant scarlet-red, trumpet-shaped flowers that are impossible to miss. The blooms are slightly smaller than ‘Heavenly Blue’ but appear in great numbers.

‘Scarlett O’Hara’ provides excellent, dense coverage with its attractive, broad leaves. It’s a strong climber that will readily cover a pergola but seems a bit less aggressive in its reach than some tricolor varieties. For a bold, high-impact color statement, this is one of the best choices out there.

‘Kniola’s Black’: Unique, Velvety Dark Blooms

If you’re looking for something dramatic and unusual, ‘Kniola’s Black’ is your plant. The flowers are a deep, velvety, purple-black that looks absolutely stunning up close, especially with their glowing magenta throats. Against a bright morning sky, they are truly unique.

This is another well-behaved Ipomoea purpurea, growing to a manageable 8 to 10 feet. It’s vigorous enough to cover a structure but won’t try to eat your house. The dark blooms pair incredibly well with silvery-leaved plants nearby or when grown on a light-colored pergola where the color can really pop.

‘Flying Saucers’: A Striking Variegated Choice

‘Flying Saucers’ is a showstopper, plain and simple. Each large flower is a unique piece of art, streaked and splashed with patterns of pale blue and white. No two blooms are exactly alike, creating a dynamic and fascinating display all season long.

It’s a sport of ‘Heavenly Blue’, so it shares that same Ipomoea tricolor vigor, easily reaching 10 to 15 feet. You get the same fast, dense coverage but with a much more exotic look. This is the perfect choice if you love the growth habit of ‘Heavenly Blue’ but want something that will make visitors stop and take a closer look.

Cardinal Climber: Delicate, Fern-Like Foliage

While not a traditional morning glory, the Cardinal Climber (Ipomoea quamoclit) is in the same family and serves a similar purpose with a completely different aesthetic. It features tiny, brilliant red, trumpet-shaped flowers that are absolute hummingbird magnets. Its most distinctive feature, however, is its delicate, feathery, fern-like foliage.

This vine provides a much lighter, airier screen than the dense canopy of its heart-leaved cousins. It offers dappled light rather than deep shade, which can be perfect for a pergola where you still want some sun to filter through. It is also far less aggressive and easier to manage, making it a foolproof choice for anyone worried about a plant getting out of hand.

Pruning and Managing Your Pergola Morning Glories

The secret to managing morning glories isn’t complicated pruning; it’s timing. Early in the season, you can pinch the tips of the main vines when they are a foot or two long. This encourages the plant to branch out, creating a fuller, denser screen from the bottom up instead of just racing to the top.

The most critical task is your fall cleanup. After the first hard frost kills the vines, cut them down to the ground and pull them off the pergola. Do not let the dead vines sit there all winter, dropping seeds onto the ground below. Raking up the debris and composting it is the single most effective way to prevent a massive volunteer crop next spring.

Finally, resist the urge to pamper these plants. They thrive in average, even poor, soil and don’t need much fertilizer. Too much nitrogen will give you a pergola covered in gorgeous green leaves but very few flowers. A bit of neglect is actually the best recipe for a stunning floral display.

Choosing the right morning glory for your pergola comes down to matching the plant’s vigor to your needs and committing to a simple cleanup routine. By selecting a well-behaved annual and pulling it down in the fall, you can enjoy a season of breathtaking beauty without creating a future problem. It’s a simple strategy that lets you have your quick cover and enjoy it, too.