Species threadleaf coreopsis
yellow flowers with dark-brown center, green leaves and stems

threadleaf coreopsis

Coreopsis verticillata 'Grandiflora'

Threadleaf Coreopsis (Coreopsis verticillata 'Grandiflora') is an amazing choice for gardening enthusiasts. Its beautiful, sunshine yellow, daisy-like flowers flower in mid-summer, above thread-like leaves. It has a low-maintenance, long-blooming habit and produces a carpet of color in flower beds and containers. It looks great along paths and in rock gardens. Plus, its drought resistant and will come back season after season for endless enjoyment. With cheerful, sunny blossoms, Threadleaf Coreopsis is a great addition to any garden.

Cycle:

Herbaceous Perennial

Watering:

Minimum

Propagation:

Division,Cutting,Seed Propagation,Layering Propagation

Hardiness Zone:

3 - 9

Flowers:

Yellow Flowers

Sun:

Full sun

Leaf:

Yes

Leaf Color:

green

Growth Rate:

High

Maintenance:

Low

Salt Tolerant:

Yes

watering

Threadleaf coreopsis (Coreopsis verticillata 'Grandiflora') should be watered about once a week, or more frequently during hot, dry weather. To ensure the water is penetrating to the plant's root system, slowly pour water at the base of the plant until the soil is saturated (around 1 inch of water). Be sure not to over-water, as this can cause root rot, and avoid wetting the foliage. When it is not raining, mulch around the base of the plant to help with soil moisture retention.

sunlight

Threadleaf coreopsis prefers full sun to light shade and blooms for the majority of the summer months. The plant tolerates drought and responds best to soil that is well-drained but still retains moisture. It grows best in sandy or gravelly, loamy, acidic or basic (alkaline) soils with good drainage. It can grow in partial shade, however, it does best with at least 6 hours per day of direct sunlight. It also prefers a pH between 5.1 and 8.0 but can tolerate higher levels of pH in most soils.

pruning

Threadleaf coreopsis should be pruned after the first flowering in early summer. It should be cut back by 2-3 inches, to make sure the plant remains compact and produces plenty of flowers. If flower production decreases in summer, a light pruning can be done. Deadheading spent flowers may help to extend the bloom time. In late winter, the stems should be trimmed to 8-10 inches to promote a bushier form and encourage more blooms.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Starts Flowering

Threadleaf coreopsis typically starts flowering in late spring, usually in May or June.

Starts Flowering

Threadleaf coreopsis typically starts flowering in late spring, usually in May or June.

Hardiness Map