Wood Ragwort (Senecio sylvaticus)

Wood Ragwort

Senecio sylvaticus

Its daisy-like blooms add subtle meadow charm, though it carries hidden toxic alkaloids. Annual or biennial herb; common name: wood ragwort.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerates dry, nutrient-poor growing conditions
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Watering Water deeply only when the top 2–3 cm of soil is completely dry; avoid overwatering to prevent root rot
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Temperature Hardy to mild frosts; prefers cool to temperate temperatures and avoids extreme summer heat
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Characteristics

  • Leaf: Basal leaves are obovate with toothed margins; upper stem leaves are smaller, pinnately lobed and sparsely hairy
  • Flower: Clusters of bright yellow composite daisy-like blooms, 1–2 cm in diameter
  • Stem: Erect, hairy, branching near the top to support flower heads
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Care Guide

Watering

Keep soil slightly moist during active growth periods; prioritize drainage over consistent moisture

Fertilization

No regular fertilization required; avoid high-nitrogen feeds that may reduce flowering. Thrives in low-nutrient soils; excess fertilizer can promote leggy growth and reduce bloom production

Crushed eggshell powder:Crush dried, rinsed eggshells into fine powder; sprinkle lightly on soil surface to add calcium without introducing excess nutrients
Pruning
  • Deadhead spent flower heads to prevent unwanted self-seeding in managed garden spaces
  • Cut back dead foliage to ground level in late autumn to reduce overwintering pest habitat
  • Thin overcrowded seedlings in early spring to improve airflow and reduce competition for resources
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; pyrrolizidine alkaloids may cause vomiting, diarrhea, and liver failure with prolonged exposure

Humans: Contains pyrrolizidine alkaloids; repeated ingestion can cause liver damage; skin contact may cause mild irritation

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Garden Uses & Culture

Culture: N/A

Usage: Wildflower meadow component; occasional ornamental for naturalized garden areas