Large-flowered Tickseed (Coreopsis grandiflora)

Large-flowered Tickseed

Coreopsis grandiflora

Bright golden blooms light up summer gardens with cheerful, daisy-like charm. Herbaceous perennial flowering plant; common name: large-flowered tickseed.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in 6+ hours of direct daily sunlight for maximum blooming; tolerates light afternoon shade in hot climates
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Watering Water deeply when the top 2–3 cm of soil is dry; avoid overwatering to prevent root rot
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Temperature Hardy to -30°C; tolerates summer heat up to 35°C; protect young plants from prolonged late spring frost
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Characteristics

  • Leaf: Linear to lanceolate, bright green, mostly basal with sparse stem leaves
  • Flower: Daisy-like composite heads, 5–8 cm diameter, golden yellow ray florets with yellow disc centers
  • Stem: Slender, upright, green stems with fine, soft hairs
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Care Guide

Watering

Keep soil consistently moist but not waterlogged

Fertilization

Feed with diluted balanced fertilizer once monthly. Stop fertilizing in late summer to prepare plants for dormancy

Composted banana peel tea:Steep fully composted banana peels in water for 24 hours; dilute 1:20 with water for root drench to promote vibrant flowering
Pruning
  • Deadhead spent blooms regularly to encourage continuous summer flowering
  • Cut back stems to 10 cm above soil level after the first frost to tidy clumps for winter
  • Thin overcrowded clumps every 2–3 years in early spring to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed: Non-toxic to cats

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: Symbolizes cheerfulness and optimism in floral language

Usage: Ornamental garden plant; cut flower for fresh bouquets