Thelesperma Species, Navajo Tea, Field Coreopsis, Greenthread, Plains Greenthread, Stiff Greenthread
Thelespermafilifolium

Synonym:Coreopsis filifolia

Category
Perennials

Water Requirements
Drought-tolerant; suitable for xeriscaping

Sun Exposure
Full Sun
Sun to Partial Shade

Foliage
Herbaceous
This plant is resistant to deer

Foliage Color

Height
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

Spacing
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)

Hardiness
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)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)

Where to Grow

Danger

Bloom Color
Bright Yellow

Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds

Bloom Size

Bloom Time
Mid Spring
Late Spring/Early Summer
Blooms repeatedly

Other details

Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)

Patent Information

Propagation Methods
By dividing the rootball
From seed; direct sow outdoors in fall

Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds