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Yellow Rattle

Rhinanthus minor

Not yet photographed by the community

Hemi-parasite that suppresses grasses to create wildflower meadows.

Species Profile

Not threatened; widespread and locally common in suitable habitats.

Lifespan: Annual; completes life cycle within one growing season (winter to late spring)
Size & Weight: 20–45 cm tall; individual flowers 12–15 mm long
Habitat: Grasslands, meadows, field margins, and disturbed ground, thriving in nutrient-poor soils and semi-natural grasslands.
UK Distribution: Found throughout the UK, more abundant in central and southern England, Wales, and southern Scotland; absent from some northern regions.
Diet: Semi-parasitic plant that photosynthesises but also feeds on nutrients from host grass roots.
Predators: Slugs, snails, and grazing herbivores; seeds eaten by birds and small rodents.
Mating Season: Flowers April to June; seed dispersal July to August.
Breeding: Produces numerous small seeds (200–500 per plant) in distinctive inflated seed pods that rattle when dry; self-fertilising and wind-pollinated.
Behaviour: As a hemi-parasitic plant, Yellow Rattle weakens grasses by feeding on their roots, making it valuable for meadow management and conservation. Seeds require a period of cold stratification over winter to germinate in spring. It is actively sown by conservationists to suppress competitive grasses.

Did You Know?

•The common name 'Rattle' derives from the papery seed pods that produce a rattling sound when shaken in wind or handled, aiding seed dispersal.
•Yellow Rattle is a semi-parasite that reduces grass vigour, allowing wildflowers to establish—making it essential for creating and maintaining wildflower meadows.
•Seeds must undergo winter cold exposure (vernalisation) to break dormancy and will not germinate if sown in warm conditions.
•The plant is traditionally sown in autumn in meadows as a 'green manure' crop to suppress grasses before wildflower planting.
•Its bright yellow flowers are visited by bees and other pollinators, though it is primarily self-fertilising and wind-pollinated.

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