Trending: garlic mustard (Alliaria petiolata) — 2651 observations this week
iNaturalist Community
Invasive Species
Garlic mustard is actively spreading through the woods and parks near you right now, outcompeting native wildflowers like trillium and wild ginger by releasing chemicals that disrupt the soil fungi those natives depend on.
Thousands of people across North America spotted and reported garlic mustard this week, making it one of the most observed plants on the citizen-science app iNaturalist. This plant is a non-native invader originally from Europe that spreads rapidly in forests and along trails each spring. It's a concern because it crowds out native woodland wildflowers and changes the soil in ways that make it hard for native plants to grow back.
Key Findings
2,651 research-grade observations were submitted to iNaturalist in a single week, indicating peak spring emergence
Garlic mustard is a biennial plant that flowers in spring of its second year, making May a high-visibility window for detection and reporting
The observation spike aligns with citizen-science monitoring patterns useful for tracking the species' geographic spread over time
chevron_right Technical Summary
Garlic mustard, one of North America's most aggressive invasive plants, is surging in iNaturalist observations this week with 2,651 research-grade sightings — likely reflecting its peak spring bloom period when it's most visible and identifiable.
Abstract Preview
garlic mustard is among the most observed plant species this week with 2651 research-grade observations.
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Species Mentioned
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Alliaria petiolata, or garlic mustard, is a biennial flowering plant in the mustard family (Brassicaceae). It is native to Europe, western and central Asia, north-western Africa, Morocco, Iberia and the British Isles, north to northern Scandinavia, and east to northern Pakistan and Xinjiang in we...