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Coreopsis verticillata 'Zagreb'

Threadleaf Coreopsis

Threadleaf Tickseed

Tickseed

Plant Family:

Asteraceae

Herbaceous Plant, Perennial

Flower:

Yellow

Blooms :

May

to:

Jul

Yellow, daisy like flowers 1-2" in diameter with yellow untoothed rays and yellow center discs

Botanical Description

Fragrant?

No

Foliage:

Green

Deciduous

Palmately 3-parted leaves with threadlike segments lend a fine textured and airy appearance to the plant

Oregon Native?

No

West State Native?

No

Eastern North America

Site Selection

Minimum USDA Hardiness Zone:

3

Water Needs:

M

Sun Needs:

Full Sun

Deer Resistant?

Yes

Firewise?

Yes

Height:

12-18"

Spread:

18"

Growth Rate:

Native Habitat:

Coreopsis is a genus of between 75-80 species from North America, Mexico, Central and South America in rocky and sandy soils

Soil:

Well-drained soil, thrives in poor, sandy or rocky soils with good drainage

Care Recommendations

Maintenance Level:

Low

Fertilizer:

Low

Mulch:

Organic

Long Term:

Divide every 2-3 years to maintain vigor

Winter:

Clean debris away from the base of the plant and provide a layer of compost but not over the crown to protect over winter

Spring:

May divide in spring every 2-3 years

Summer:

Deadhead flowers and stalk to the foliage, shear back 25-50% in late summer to encourage rebloom in fall.

Fall:

It's not necessary to cut back in fall - but leaving 6-8" of stem helps protect the plant in winter

Common Problems

Tends to sprawl and can self-seed and spread by rhizomes in moist, fertile soil. Crown rot may occur if grown in moist poorly drained soils.

Diseases:

Uncommon diseases - powdery mildew, botrytis, fungal spots

Insects:

Also called:

COMGA

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