Plains Coreopsis (Coreopsis tinctoria)

Plains Coreopsis

Coreopsis tinctoria

Cheerful daisy-like blooms paint meadows in gold and crimson. Annual flowering herb; common names: Plains Coreopsis, Tickseed.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun for maximum flowering; tolerates partial shade but produces fewer blooms
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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 Hardy to extreme cold winters; thrives in warm summer temperatures and tolerates mild late spring frost
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Characteristics

  • Leaf: Feathery, finely divided linear leaves, bright green with smooth margins
  • Flower: Daisy-like composite heads with yellow ray florets and maroon central disks
  • Stem: Slender, branching green stems covered in fine, soft pubescence
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Care Guide

Watering

Keep soil evenly moist during active growth periods

Fertilization

Diluted balanced liquid feed every 2 weeks. Discontinue fertilization as flowering declines in late summer to support natural seed production

Banana peel compost tea:Soak fully composted banana peels in water for 24 hours; dilute 1:20 with water for root drenching to avoid nutrient burn
Pruning
  • Deadhead spent blooms regularly to encourage continuous flowering through summer
  • Cut back stems to ground level after the first frost to tidy garden beds and support self-seeding
  • Thin overcrowded seedlings in early spring to improve airflow and reduce competition for nutrients
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no reported adverse effects

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: Symbolizes cheerfulness, optimism, and long-lasting friendship

Usage: Ornamental garden plant; historically used by Indigenous peoples to produce yellow and red natural dyes