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Tickseed

Coreopsis verticillata 'Zagreb'

Coreopsis verticillata 'Zagreb' (threadleaf coreopsis or tickseed) is grown for its airy, ferny foliage and a long run of sunny yellow flowers.

At a glance

Hardiness

3 – 9

Light

Full sun, Partial shade

Mature size

25 – 45 cm tall × 30 – 45 cm wide

Garden uses & seasonal interest

Plant characteristics

Plant type

Herbaceous Perennial

Season of interest

March - October

Where it grows best

Water

Moist, well-drained soil

What to expect

Blooms

Mar–Oct

Good to know

Pollinator friendly
Deer resistant
Drought tolerant
Bird friendly
Low maintenance
Bushy · Clump-forming

Perfect for

Ground coverEdgingGarden bedsXeriscape

Seasonal interest

How this plant changes through the year.

Spring

Foliage
green

Summer

Flowers
yellow
Foliage
green

Fall

Flowers
yellow
Foliage
green

Care Information

Pruning
Snip off faded flowers to keep the plant looking tidy and to help it keep blooming. After the main summer show, a midseason shear freshens the foliage and often brings another round of flowers later.
Soil
Clay, Loam, Sand, Gravely soil
Soil pH
Acid, Alkaline, Neutral
Pests
Slugs and snails may chew young growth, especially where soil stays damp. Aphids and other small sucking insects can appear at times, but strong plants usually bounce back with minimal trouble.
Diseases
Leaf spot or powdery mildew can show up in muggy weather or when plants are crowded, so good spacing helps. Root rots are most likely in poorly drained soil, so well-drained ground and careful watering are important.
Propagation
Make new plants by lifting and dividing the clump in spring as fresh growth starts. Basal cuttings taken in spring can also root well in a lightly moist potting mix.

Characteristics

Type
Herbaceous Perennial
Variegated
No
Family
Asteraceae
Synonyms
Coreopsis 'Zagreb', Threadleaf Coreopsis 'Zagreb', Tickseed 'Zagreb', Whorled Coreopsis 'Zagreb'

Placement

Aspect
East, South, West