February 17, 2026 at 9:48 am

As You Pull On Your Gardening Gloves To Tackle Them Once Again This Year, What Exactly Is A Weed?

by Kyra Piperides

Dandelions on a lawn

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As spring comes around, a certain type of human emerges from their hibernation.

The gardener.

Armed with forks and seeds, back-achingly large bags of compost, and a wide-brimmed hat, these gardeners take to the land surrounding their homes, mowing and sowing, plucking and pruning as if their happiness depended on it.

According to copious mental and physical health studies, it actually does, with gardening a huge help to physical and mental health.

A woman tending plants

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But if there is one thing that really does threaten a gardener’s mental health, it’s the prevalence of weeds.

Whether ruining their meticulously seeded lawn, ruining their floral displays or jostling for space amongst their vegetable plants, the pesky weed is the bane of many a gardener’s workload (though it’s admittedly quite cathartic to pull them out!)

But what exactly is a weed? How does it differ from the plants that the gardener lovingly cultivates?

Well that, unfortunately for the plant, is an entirely subjective matter.

Ivy growing up a wall

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According to a horticulture article from Iowa State University, a weed is designated by the gardener, since it is simply defined as a plant that is growing where it is unwanted.

Dandelions and Japanese Knotweed, ivy and brambles are often broadly accepted as weeds, since their hardy and sometimes invasive nature makes them very good at growing where you might not want to. But as the article explains, no plant is truly safe:

“No one species of plant is always considered a weed in all settings, and no species of plant is never considered a weed, although some species are more often growing where we don’t want them than others!”

Just as beauty is in the eye of the beholder, weed is in the eye of the gardener. Don’t like weeding? Why not fall in love with the weeds on your lawn instead.

If you thought that was interesting, you might like to read about why we should be worried about the leak in the bottom of the ocean.

Kyra Piperides, PhD | Contributing Science Writer

Dr. Kyra Piperides is a contributing writer for TwistedSifter, specializing in Science & Discovery. Holding a PhD in English with a dedicated focus on the intersections of science, politics, and literature, she brings over 12 years of professional writing and editorial expertise to her reporting.

Kyra possesses a highly authoritative background in academic publishing, having served as the editor of an academic journal for three years. She is also the published author of two books and numerous research-driven articles. At TwistedSifter, she leverages her rigorous academic background to translate complex scientific concepts, global tech innovations, and environmental breakthroughs into highly engaging, accessible narratives for a mainstream audience.

Based in the UK, Kyra is an avid backpacker who spends her free time immersing herself in different cultures across distant shores—a passion that brings a rich, global perspective to her writing about Earth and nature.

Connect with Kyra on Twitter/X and Instagram.