Bristly Ox-tongue (Helminthotheca echioides)

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Sunlight Full sun to partial shade; tolerates dry, exposed growing conditions

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Watering Drought-tolerant; water only during prolonged dry spells to avoid root rot

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Temperature Hardy to light frost; thrives in warm temperate summer conditions

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Leaf: Lanceolate, bristly, with spiny margins; basal leaves form a dense rosette
Flower: Yellow daisy-like heads (2–3 cm diameter); bracts have hooked spines
Stem: Erect, branched, covered in stiff, coarse bristles

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Watering

Water occasionally during extended dry periods

Fertilization

No regular fertilization required. Excess fertilizer may reduce flower production and increase foliage growth

Composted eggshell powder：Sprinkle a thin layer around base of plants in early spring; avoid direct contact with foliage

Pruning

Deadhead spent flowers to prevent unwanted self-seeding in managed gardens
Remove faded basal foliage after flowering to maintain tidy growth
Thin overcrowded seedlings in early spring to improve airflow and reduce competition

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No documented toxicity to humans

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Culture: N/A

Usage: Wildflower meadow component; provides nectar for bees and butterflies