Here are our answers to your most common questions about dealing with cow parsley:
How Invasive plants are those that grow vigorously, spread rapidly and can out-compete other plants. Native, non-native and cultivated plants can all be invasive.
invasive is cow parsley?
Cow parsley self-seeds readily, so if individual plants are left to mature, you’ll see many more appear the following year. This is good news in a wildlife corner or meadow, but not so welcome in more formal parts of the garden. The good news is that it is easy to remove unwanted plants, and doing so before they set seed will stop them spreading any further. As cow parsley is a short-lived perennial, or sometimes just biennial, individual plants don’t persist for many years.
Do I need to get rid of cow parsley?
No – allowing cow parsley to grow in a grassy meadow, wildlife corner or romantic-style area is a great way to boost the The variety of living organisms (plants, animals, fungi and microorganisms) in a particular environment. Boosting the biodiversity of your garden has many benefits, including supporting wildlife, improving soil health and reducing the likelihood of pest and disease problems.
biodiversity of your garden. And, as cow parsley attracts beneficial insects, like hoverflies, some of which eat aphids, having cow parsley in your garden is a good way to improve the health of your other plants.
It is, however, a good idea to control the spread of cow parsley, by deadheading before plants set seed or selectively removing individual plants, so it doesn’t get out of hand. This is particularly important around young or low-growing plants which could become shaded by its tall stems.
What is the easiest way to kill cow parsley?
If you have cow parsley growing where it is not wanted, there are a few easy ways to remove it:
- Fork out plants – use a hand fork to remove cow parsley
A seedling is a young plant grown from seed.
seedlings and a border fork to lift mature plants, making sure to insert deep enough to get below the A large, tapering, central root that grows downward. It's typically thicker and deeper than the other roots, allowing access to water and nutrients from deeper in the soil. Plants with taproots include dandelions, carrots and parsley.
taproot and lift it out whole. Doing this in late spring, when plants have begun to develop the tall flower stems but haven’t yet started flowering, gives you good purchase without the risk of spreading seed. Position your fork at the base of the plant to minimise soil disturbance.
- Mow regularly – repeated mowing of cow parsley in grassy areas will weaken and eventually kill it.
Add young cow parsley plants, and grass clippings containing them, to your home compost bin, but consign those from mature, flowering plants to your council green waste recycling bin instead. This helps to prevent inadvertently spreading the seeds around your garden when you use home-made compost.
Should I use a weedkiller?
No – established cow parsley plants are resistant to most lawn weedkillers, and plants can easily set and ripen seed in the time it takes for weedkillers to take effect. Non-chemical options are easy, effective and better for the environment.
For more information, see our page on Weeds: non-chemical controls.