Three-lobed Buttercup (Ranunculus trilobus)

Three-lobed Buttercup

Ranunculus trilobus

Bright yellow blooms dot grassy edges like sunny confetti. Short-lived perennial herb; common name: Three-lobed Buttercup.

Full sun
2–3/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in open grassy areas with consistent daily sunlight
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Watering Keep soil evenly moist but not waterlogged; tolerate brief dry spells without permanent damage
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Temperature Hardy to mild frost; prefers cool to temperate temperatures and avoids extreme heat above 28°C
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Characteristics

  • Leaf: Basal leaves are three-lobed with toothed margins; stem leaves are smaller and less divided
  • Flower: Bright yellow, 5-petaled, cup-shaped blooms with glossy petals
  • Stem: Slender, hairy, branching stems that spread low to the ground
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Care Guide

Watering

Keep soil consistently moist; water when the top 1 cm of soil dries out

Fertilization

Diluted balanced liquid feed every 2 weeks. Use diluted feeds to avoid over-fertilization that reduces flowering

Eggshell powder topdressing:Sprinkle finely ground, dried eggshells around the base of plants to boost soil calcium; avoid direct contact with stems to prevent fungal growth
Pruning
  • Deadhead spent blooms regularly to encourage extended flowering through early summer
  • Trim back yellowing foliage after blooming to maintain a neat garden appearance
  • Thin self-seeded seedlings to prevent overcrowding and improve airflow
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ranunculin converts to irritant protoanemonin, causing oral pain, drooling, vomiting, and diarrhea

Humans: Contains ranunculin that converts to protoanemonin when chewed; ingestion causes oral irritation, nausea, or vomiting

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Garden Uses & Culture

Culture: N/A

Usage: Wildflower garden ornamental; supports native pollinators including bees and butterflies