What You Should Know About Oxeye Daisies in Your Yard

Who doesn’t love daisies? Those familiar, sunny white and yellow blooms are cheerful and summery, and a familiar sight in meadows and wildflower gardens. If you’ve planted a wildflower garden of your own, there’s a good chance you’ve seen oxeye daisies, which look like traditional flowers we’ve come to know and enjoy…but there’s more to this plant than meets the eye.

What is an oxeye daisy?

The oxeye daisy (Leucanthemum vulgare) is a hardy perennial flower originally native to Europe and parts of Asia. It thrived when it was introduced to North America in the 1800s, and the flowers spread extensively across the US and Canada. 

It’s so successful because it can survive in poor soil, needs little water, and reseeds itself easily. While that’s great for low-maintenance gardening, it’s also exactly what makes it invasive in many areas.

Are oxeye daisies invasive in Connecticut?

Yes. In most of the northeastern U.S., the oxeye daisy is considered invasive. It spreads through both seed and underground rhizomes, forming dense patches that crowd out native wildflowers and grasses.

In meadows or pollinator gardens, this can be a problem:

• It reduces plant diversity. That means that native plants — the plants that provide pollen and nutrition for other species — have to fight for the nutrients they need to survive. 
• Invasive plants like oxeye daisies offer less value to native wildlife than true native plants. This impacts the potential survival of some species and the migratory patterns of others. 
• It can dominate your garden over time if left unmanaged, choking out your other plants. Not only will you no longer have your ideal garden, it may end up costing you time, money, and stress to control the spread of these invasives. 

 Should you remove oxeye daisies?

That depends entirely on your goals. 

• If you’re aiming to support native pollinators, butterflies, or a more balanced ecosystem, we recommend gradually removing oxeye daisies and replacing them with native alternatives
• If you’re mainly looking for low-maintenance, cheerful flowers and don’t mind some spread, you can leave them for now, but be sure to monitor them closely to ensure they don’t take over. Left unchecked, they’re likely to outcompete other species.

Native alternatives to the oxeye daisy

Do you love the look of oxeye daisies, but hate the potential catastrophic invasion? We got you. Here are some similar flowers, mostly in the aster family, that are native to the area. These blooms are equally beautiful and offer great ecological benefits. These native Connecticut wildflowers include: 

• Black-eyed Susan (Rudbeckia hirta) – as sunny and cheerful as the oxeye daisy, but native and beneficial. 
• Oxeye sunflower (Heliopsis helianthoides) – these “false sunflowers” are smaller than traditional flowers, growing to a height of about three feet, but they’re still bright and lovely. They’re great for pollinators — and for cutting. 
• Coreopsis (Coreopsis lanceolata) – Coreopsis is a popular perennial and is found in many gardens. This variety looks very similar to the oxeye sunflower, but grows in small clusters and only reaches one or two feet in height. 
• New England aster (Symphyotrichum novae-angliae) – with their stunning purple petals and yellow centers, New England asters make a technicolor alternative to oxeye daisies. As they bloom later in the season, they’re a nice choice for gardeners who want to enjoy their flowers into the fall months. 
• Wild bergamot (Monarda fistulosa) – not part of the aster family, but this purple flower is a great pollinator that attracts bees, butterflies, and hummingbirds, while keeping deer (and, allegedly, mosquitoes!) at bay. 

Whether you stay in the yellows or dip into the purples, all of these species offer great color, attract pollinators, and play better with others in a mixed planting.

How to manage oxeye daisies

If you have unwanted oxeye daisies on your property and want to control them, here are some tips:

• Mow before they go to seed (usually late June to mid-July in Connecticut). Mowing regularly will prevent oxeye daisies from flowering. Frequent mowing will also encourage the leaves to flatten and spread, which creates a larger surface area for herbicides to be absorbed. 
• Dig out dense clumps in fall or early spring. The plants have shallow root systems and are actually fairly easy to pull. If you can’t pull them, though, be sure to cut down the daisies before they can flower and produce seeds. 
• Interseed with native plants to help shift biodiversity naturally. Planting competitive perennial grasses like tall fescue or orchard grass can help crowd out oxeye daisies by shading them and limiting their growth. This approach works especially well in pastures and meadows where these grasses are well-suited to the conditions. 
• While hand-pulling, cutting, or mowing can prevent oxeye daisies from going to seed, these methods alone are not enough to control an infestation.Sometimes, they can make the problem worse by stimulating the plant’s underground rhizomes to spread. Mechanical cultivation, on the other hand, can be more effective; oxeye daisies have shallow roots that are easily killed when they’re cut and exposed to sun and air. 

Need help managing your lawn or shrubs?

Not ready to handle invasive plants on your own? Whether it’s invasive wildflowers, a patchy lawn, or a hydrangea that refuses to flower, we can help! Contact us today for a consultation or seasonal maintenance plan.