Coreopsis Species, Threadleaf Coreopsis, Tickseed

Coreopsisverticillata

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Coreopsis (kor-ee-OP-sis)
Species
verticillata (ver-ti-si-LAH-tuh)
Synonym
Sun Exposure
Full Sun
Foliage
Herbaceous
Height
24-36 in. (60-90 cm)
Spacing
18-24 in. (45-60 cm)
Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
Danger
N/A
Bloom Color
Bright Yellow
Bloom Time
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Grow outdoors year-round in hardiness zone
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
May be a noxious weed or invasive
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; sow indoors before last frost
From seed; direct sow after last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Keystone Heights, Florida

Satellite Beach, Florida

Cordele, Georgia

Boise, Idaho

Washington, Illinois

Jeffersonville, Indiana

Florence, Mississippi

Kansas City, Missouri

Winston Salem, North Carolina

Belfield, North Dakota

Enid, Oklahoma

Tulsa, Oklahoma

Birdsboro, Pennsylvania

Sioux Falls, South Dakota

Abilene, Texas

Arlington, Texas

Fort Worth, Texas

Milwaukee, Wisconsin

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Gardener's Notes:

2
positives
4
neutrals
0
negative
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G
(Zone 5a) | February 2012 | neutral

Can spread fairly quickly and somewhat prone to powdery mildew. Blooms June - September in my garden. Crop back for fresh growth when s...Read More

L
Satellite Beach, FL | September 2008 | positive

So far I only have this one volunteer plant which I hope will reproduce. It has bloomed continuously from early Spring and is still going...Read More

B
Lakemont, GA (Zone 8a) | March 2007 | neutral

Medium 24" - Plant 14" apart. Golden yellow with green wispy foliage. Continuously in bloom from early summer right into fall. Makes a go...Read More

L
Jeffersonville, IN (Zone 6a) | October 2006 | positive

Easy from seed and long-blooming. I strongly prefer these over black-eyed susans.

T
T
Murfreesboro, TN (Zone 7a) | April 2001 | neutral

Tough, drought-tolerant plant. Can become invasive if not deadheaded.

G
Wentworth, SD (Zone 4a) | November 2000 | neutral

These are a perennial in zones 4-9. They need full sun and well drained soil that is fertile and somewhat moist. They produce yellow fl...Read More

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