Greater tickseed

Greater tickseed (Coreopsis major) is a robust perennial herb belonging to the Asteraceae family. This species is widely recognized in ornamental horticulture for its resilience, ease of maintenance, and vibrant yellow, star-like flowers that provide a long-lasting display in garden landscapes throughout the summer months.

Originating from the southeastern United States, this plant is native to diverse habitats, including open woodlands, forest clearings, and dry, sunny hillsides. Its natural adaptability to various environmental conditions has made it a favored species for gardeners seeking low-input, high-impact perennial plants that can thrive in temperate climates.

Botanically, Coreopsis major typically grows to a height of 2 to 3 feet, featuring erect, leafy stems with distinctively shaped leaves. The plant exhibits a branching habit, which supports a large number of flowering heads. The root system is well-developed, allowing the plant to establish itself firmly and survive periods of moderate drought once fully mature.

Cultivation requirements for this species are relatively straightforward. It flourishes in full sun and requires well-drained soil, tolerating a range of soil types from sandy to loamy. Effective agrotechnical management involves regular weeding and occasional irrigation during prolonged dry spells. Deadheading spent flowers can encourage a secondary flush of blooms, maintaining the plant's aesthetic appeal.

In terms of agricultural and horticultural health, Coreopsis major is generally considered a sturdy plant with few serious issues. However, growers should monitor for common potential problems:

• Powdery mildew development in environments with poor air circulation.
• Aphid infestations occurring on tender new growth during the spring.
• Root rot caused by planting in heavy, poorly drained clay soils.