About Coreopsis
For a low-maintenance, drought-tolerant, and long-blooming flower to fill a garden bed or line a border, coreopsis plants, also known as tickseed, are an excellent and reliable choice. These vibrant, daisy-like blooms lack a noticeable fragrance, but their foliage emits a subtle anise-like scent. Native to North America, coreopsis grows in upright clumps and produces flowers all summer long.
When to Plant Coreopsis Roots
The best time to plant coreopsis roots is in the late spring, after the last frost has passed. This way, they can establish before the main growing season.
Where to Plant Coreopsis Roots
Coreopsis is a popular choice for native wildflower gardens; consider grouping with other North American natives in an area that receives full sun where it can thrive. Specifically, choose a location where it can receive at least six to eight hours of direct sunlight daily for abundant flowering. It can tolerate light shade but may produce fewer blooms.
Coreopsis prefers well-drained soil, tolerating poor and sandy conditions as long as they are well-draining. Do not choose a location where there is heavy, clay, or waterlogged soils.
How to Plant Coreopsis Roots
Loosen the soil to a depth of 12 inches. Add compost or well-rotted manure if the soil is extremely poor, but coreopsis generally thrives without heavy amendments.
Dig a hole about three to four inches deep and wide enough to accommodate the root system. Place the roots in the hole with the crown (where roots meet the stems) at soil level. Gently fill the hole with soil, pressing lightly to eliminate air pockets. Water thoroughly after planting to settle the soil around the roots. Add additional soil if necessary, and apply a layer of mulch around each plant to help retain moisture.
Allow 12 to 24 inches between plants to accommodate its spreading habit, promote good air circulation, and help ensure that it stays generally pest- and disease-resistant. Protect from slugs while plants are young.
How to Care for Coreopsis
Water regularly during the first growing season to establish roots. Once established, coreopsis is drought-tolerant and requires minimal watering. New growth should appear within three to four weeks after planting, depending on conditions. Coreopsis then blooms from early summer to fall, offering a long season of color. Coreopsis requires little care once established. Taller varieties may need staking or support. Fertilize lightly with a balanced fertilizer in early spring if growth appears slow. Over-fertilizing can result in fewer flowers.
Remove spent blooms to encourage continuous flowering throughout the season. If need be, shear back plants by one-third in midsummer if flowering slows down. This rejuvenates the plant and encourages a fresh flush of blooms. In colder climates, cut back spent foliage after frost and apply a thin layer of mulch for root protection.
Divide clumps every two to three years in early spring or fall to maintain vigor and prevent overcrowding.