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11 Shrubs You’ll Regret Planting

Some are garden thugs, others are maintenance hogs or one-hit wonders. Don't bother planting these shrubs.

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Tansy (Tanacetum vulgare)Getty Images

Tansy

Also known as common tansy, cow buttons and bitter burrows, Tanacetum vulgare, or tansy, is native to warm parts of Europe and Asia. It has been introduced to North America, where in some places it’s considered invasive.

The tall reddish stalks and bright yellow, button-like flowers are certainly eye catching, but this plant shouldn’t be allowed anywhere near your yard. Not only are the leaves and flowers toxic, but consumption of the plant can cause liver and brain damage, along with convulsions. Even if you don’t routinely eat the plants in your yard, best be safe and stay away from tansy.

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PrivetStephen Power/Shutterstock

Privet

Pruning a privet hedge is like painting the Golden Gate Bridge — once you’re done, you turn around and start over. At least it seems that way.

Privet (Ligustrum spp.) grows so quickly that it has to be pruned four to five times a year to keep that neat-and-clean look. It does provide privacy, but doesn’t have much beauty. And if you fall behind on the trimming, it will quickly become unkempt. Choose something that doesn’t require so much maintenance. Want more? Here are 37 plants you don’t want to grow.

Plus, check out this shrub pruner we love:

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leaves Luka Hercigonja/Shutterstock

Staghorn Sumac

It’s a relative of poison ivy. Need we say more? Not everyone is allergic to staghorn sumac (Rhus typhina), but those who are will experience intense itching that’s only temporarily relieved by scalding water (not recommended, by the way).

Then there are the watery blisters that spread the itchiness if they’re opened by scratching or bathing. Now, why would you want to bring THAT into your yard? Did we mention staghorn sumac spreads easily by its roots and forms thickets? Ugh. If you think sumac is bad, read this description of the ultimate bad-boy plant.

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barberryAlina Kuptsova/Shutterstock

Japanese Barberry

Japanese barberry (Berberis thunbergii) sneers at neglect and doesn’t even bat an eye at drought. To top it off, there are some much nicer colorful cultivars out there in hues of chartreuse and burgundy. Japanese barberry shrubs are thorny (good for barriers, bad for bare skin). The bright red or orange berries are eaten by birds, then the seeds are deposited elsewhere.

Spreading quickly, Japanese barberry can dominate a landscape. It crowds out native plants, especially in the Northeast, Great Lakes area and parts of the Northwest. There are better options without the baggage. Want to remove some dreadful shrubs? Here’s how!

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AutumnalPeter Turner Photography/Shutterstock

Burning Bush

It’s got show-stopping fall color — the red and yellow really catch the eye even from a distance — and it’s simple to grow. However, burning bush (Euonymus altatus) grows fast, up to 15 feet in height, so it typically needs regular pruning where space is lacking. And it has become invasive in woodlands in the East, Midwest and South, thanks to seeds dispersed by birds. It can’t even be legally sold in Massachusetts and New Hampshire.

Looking for plants that could give you privacy? Here are some privacy plants to consider.

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Honeysuckledamann/Shutterstock

Bush Honeysuckle

Bush honeysuckle (Lonicera spp.) has fragrant flowers and bright red berries. Sounds good, right? But it’s a nasty pest that spreads by roots and seeds. It pops up everywhere and out-competes native vegetation simply because it is so undemanding. Sun, shade, wet, dry — to bush honeysuckle, it’s all good. And if you grow one, it’s all bad (for you).

Here are 10 flowering shrubs you should consider growing.

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Pyracanthamalamiute/Shutterstock

Pyracantha

It’s a tough shrub with bright orange or red berries. It can be trained into a topiary, too. However, pyracantha is a problem in California, Texas and parts of the Deep South, where it has invasive tendencies. Elsewhere it’s just a hassle to deal with, thanks to thorny branches and a tendency to “bite back,” meaning you have to deal with the thorns as you remove the dead wood. Check out these 11 sparkling shrubs for today’s yards.

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busharenysam/Shutterstock

Butterfly Bush

Butterfly bush (Buddleja davidii) has its virtues. After all, it attracts butterflies — that can’t be bad. And it’s drought tolerant and has pretty flowers.

In northern climes, however, it dies back to the roots in winter, so you have to cut it back to the ground in spring (more work) and hope it still flowers. And in areas like the Pacific Northwest and much of the East, butterfly bush is considered invasive. If you do grow one, look for a sterile cultivar. These are the 15 trees you should never grow in your home landscape.

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berriesNelly B/Shutterstock

Buckthorn

Like so many other invasive species, buckthorn (Rhamnus cathartica) was brought to this country as an ornamental. It’s now considered a noxious weed because it outcompetes native vegetation, forming an impenetrable barrier and degrading wildlife habitat. Its thorny nature is also no fun to work with, so good luck taking a pruning saw to it. Here are 10 invasive plants you should get out of your garden right now.

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ForsythiaSulla Mino/Shutterstock

Forsythia

Everyone loves this golden harbinger of spring when it’s in bloom, for about 15 minutes in early spring. Seriously. The show is about a week long, and then you have a green blob the rest of the growing season. Make that a green blob constantly in need of a haircut, because forsythia tends to look unruly if it doesn’t get a regular snip. More maintenance and fewer flowers (if you wait too long to prune it) is not a recipe for a great shrub when there are so many better candidates.

Never plant these flowers in your garden.

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LeafVolodymyr Nikitenko/Shutterstock

Autumn Olive

This weedy shrub has sharp thorns, which makes it a pain to deal with. Literally. But the real threat is that autumn olive (Elaeagnusspp.) is easily spread by birds, then ends up out-competing other plants because it is so adaptable. It even makes its own nitrogen. It’s actually banned in a number of states. Here’s how to stop invasive plants from taking over your yard.

Luke Miller
Luke Miller is an award-winning garden editor with 25 years' experience in horticultural communications, including editing a national magazine and creating print and online gardening content for a national retailer. He grew up across the street from a park arboretum and has a lifelong passion for gardening in general and trees in particular. In addition to his journalism degree, he has studied horticulture and is a Master Gardener.