St. John's Wort blooming peak draws hundreds of naturalist sightings
iNaturalist Community
Medicinal Plants
St. John's Wort blooming along roadsides and meadow edges right now is one of summer's most reliable phenology markers, and knowing it also attracts specialist native bees makes it worth a second look on your next walk.
Common St. John's Wort, a bright yellow wildflower found across fields, roadsides, and disturbed ground, is currently being spotted and reported by plant watchers all over. This week alone, over 400 confirmed sightings were submitted to iNaturalist, suggesting the plant is at or near peak bloom. It's a species with a long history in folk medicine and a real role in summer ecosystems as a pollen source for native insects.
Key Findings
405 research-grade observations recorded in a single week on iNaturalist
Observation volume places Common St. John's Wort among the most-tracked plant species this week globally
Spike aligns with mid-summer bloom window, when bright yellow flowers are most visible and identifiable
chevron_right Technical Summary
Common St. John's Wort is having a standout week on iNaturalist, with 405 research-grade observations logged by community naturalists. The spike signals peak bloom season for this widespread medicinal wildflower.
Abstract Preview
Original paper
Trending: Common St. John's Wort (Hypericum perforatum) — 405 observations this week
Common St. John's Wort is among the most observed plant species this week with 405 research-grade observations.
open_in_new Read full abstractAbstract copyright held by the original publisher.
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Phenology is the study of recurring biological events in plant life cycles—such as flowering, fruiting, and germination—and how these events are timed in response to seasonal and climatic conditions. This research is essential to plant science because phenological patterns directly influence
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