Threadleaf Coreopsis (Coreopsis verticillata) brings a fine-textured, airy look to borders and naturalized plantings, then lights it up with cheerful, daisy-like yellow flowers. You will get the best bloom in full sun, but the plant also performs well with partial shade, especially where summers are hot. Mature plants typically reach about 24-36 inches tall with a neat, clumping habit and a light, open feel that mixes easily with grasses and other summer perennials.

Plant it in well-drained soil and resist the urge to overwater or overfertilize. This species is at its strongest in lean, sandy, or rocky ground; overly rich or consistently wet soil can lead to weak stems and flopping. Once established, it is notably tolerant of drought and dry soil, making it a smart choice for hot, sunny spots where you want dependable summer color with minimal fuss.

For an extra-long display, deadhead spent blooms as practical, or shear the plant back lightly in mid to late summer to refresh the foliage and encourage rebloom later in the season. The clumps can spread by rhizomes, and you can divide them every few years in early spring or fall to maintain vigor and to share plants with friends. This is also an easy perennial to tuck into native plant gardens and mixed beds for a natural look.

Threadleaf Coreopsis is a pollinator-friendly perennial that draws butterflies and other beneficial insects, while its seeds can provide food for birds. It is also noted for tolerance of deer pressure in many landscapes. Pair it with other sun-loving, well-drained companions for a bright, low-maintenance planting that looks good from early summer well into the season.

Specifications

• Cold hardiness zone: 3-9 (-40 degrees F) - Contact your local extension to confirm hardiness if you are in a fringe zone (we cannot guarantee hardiness in fringe zones)
• Light: Full sun   Part sun
• Growth rate: Fast
• Mature height: 24-36"
• Spread: 18-24"
• Tolerant of: Deer, Drought, Poor Soil, Salt
• Attracts: Butterflies
• Good for borders & edging: Yes
• Long bloom time: Yes
• Native to the U.S.: Yes

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