Large-flowered tickseed

Large-flowered tickseed (Coreopsis grandiflora) is a herbaceous perennial plant belonging to the Asteraceae family. This culture is highly regarded for its prolific blooming period, which fills landscapes with vibrant yellow daisy-like flowers from early summer through the first autumn frosts.

Native to the prairies and open woodlands of North America, the plant is naturally adapted to sunny, dry environments. Its historical range has facilitated its success as a popular ornamental plant worldwide, as it thrives in diverse climatic zones where it can access full sunlight and well-drained soil conditions.

Botanically, the plant features finely divided, lance-shaped leaves and tall, sturdy stems that hold bright golden flower heads. The root system is hardy and perennial, allowing the plant to survive winter dormancy in temperate regions. It typically reaches a mature height of 18 to 30 inches, depending on the specific cultivar and soil fertility.

Cultivation requirements for this species focus primarily on sunlight and drainage. It requires at least six to eight hours of direct sun daily. The soil should be slightly acidic to neutral, light, and sandy, as heavy clay soils can lead to root rot. While drought-tolerant once established, supplemental watering during prolonged dry spells ensures maximum flower production.

Tickseed is versatile in landscaping, serving as an excellent choice for borders, rock gardens, and mass plantings.

• Common pests: aphids and leaf beetles.
• Common diseases: powdery mildew and crown rot.
• Care tips: Deadheading spent blooms encourages continuous flowering and prevents self-seeding, which helps keep the plant's energy focused on root development for the next season.