Threadleaf Tickseed 'Zagreb'

About this plant

Coreopsis verticillata 'Zagreb', commonly known as Threadleaf Tickseed, is a vibrant and reliable perennial celebrated for its profusion of bright golden-yellow flowers that appear from early summer through fall, often continuing until the first frost. Its delicate, feathery foliage forms a neat, mounding habit, providing an excellent textural contrast in the garden. This cultivar is a champion of continuous bloom, making it a stellar choice for adding consistent color to perennial borders, rock gardens, and container arrangements. Its fine texture and abundant flowers create a cheerful, meadow-like feel, attracting beneficial pollinators while remaining remarkably low-maintenance. 'Zagreb' is particularly prized for its compact size, exceptional hardiness, and resistance to powdery mildew, ensuring a beautiful display year after year with minimal effort. It's an indispensable plant for cottage gardens, urban landscapes, and anyone seeking long-lasting, sunny appeal.

Installation timing

When we're in season, outside of the winter months, our goal is to get your plants installed within about two weeks. That window gives us enough time to secure your plants from our supplier and find a spot on the schedule. Throughout the process we stay in touch through notifications and your existing client portal on the main A Cut Above website, which is separate from this landscaping plants shop.

Care & maintenance

Easily grown in average, dry to medium, well-drained soils in full sun. Prefers consistent moisture but tolerates some drought once established. Deadhead spent flowers to encourage continuous blooming. Cut back hard in late winter or early spring to promote vigorous new growth. Divide clumps every 2-3 years in spring to maintain vigor.

Watering suggestions

Proper watering is the single most important factor in your plant's survival after installation. Newly installed plants have a limited root system and rely on you for consistent moisture while they establish.

• First 2 weeks: Water deeply every day (or every other day in cooler, wet weather), soaking the root ball and surrounding soil.
• Weeks 3–12: Water deeply 2–3 times per week, adjusting for rain, heat, and soil drainage.
• After establishment: Water deeply about once a week during the growing season, and more often in extreme heat or drought.
• How to check: Stick a finger 2–3 inches into the soil near the roots — if it's dry, it's time to water. Deep, less-frequent watering encourages strong roots; shallow daily sprinkles do not.
• Avoid: Overwatering (soggy, waterlogged soil) is just as harmful as underwatering and can drown roots.

Watering needs vary by plant, season, soil, and exposure. Because proper watering is the customer's responsibility after installation, please make sure you understand and can follow these suggestions before ordering.

Good to know: plants and trees purchased from and installed by A Cut Above include a one-year limited warranty from the date of installation. Because plant survival depends heavily on proper watering and care after installation, losses caused by improper care, neglect, animal or chemical damage, or extreme weather are not covered, and we must be given the chance to inspect a struggling plant before it's removed or replaced. Coverage is one replacement per plant. Read our warranty info.