Tall Ox-tongue (Picris rhagadioloides)

Tall Ox-tongue

Picris rhagadioloides

Daisy-like blooms brighten dry, sunny landscapes. Annual herbaceous flowering plant; common name: Tall Ox-tongue.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun exposure preferred for optimal flowering; tolerates partial shade in hot climates
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Watering Water deeply when the top 2–3 cm of soil is dry; drought-tolerant once established
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Temperature Thrives in warm temperate to Mediterranean climates; tolerates light frost down to 5°C
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Characteristics

  • Leaf: Basal rosette of lanceolate leaves with toothed margins; stem leaves are smaller, clasping the stem
  • Flower: Yellow composite daisy-like heads (2–3 cm diameter) with prominent ray florets
  • Stem: Erect, densely hairy, with branched upper stems
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Care Guide

Watering

Water regularly to support active growth and flowering; avoid waterlogging

Fertilization

Diluted balanced liquid feed once every 4 weeks. Fertilization is optional; plant can thrive in low-nutrient soils

Banana peel tea:Soak 1 chopped banana peel in 1 liter of water for 24 hours, strain, and drench the soil; avoid overapplication to prevent nutrient buildup
Pruning
  • Deadhead spent blooms to encourage extended flowering period
  • Remove yellowing basal leaves to improve airflow and reduce pest habitat
  • Cut back the entire plant to ground level after flowering to clear garden debris
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No documented toxic effects for humans; young leaves are edible in small quantities

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental for rock gardens and wildflower meadows; young leaves are edible in fresh salads