Spikeweed, Tarweed, Smooth Tarplant
Hemizoniapungens

Family: Asteraceae (ass-ter-AY-see-ee)
Genus: Hemizonia (hem-ih-ZOH-nee-uh)
Species: pungens (PUN-gens)

Category
Annuals

Water Requirements
Average Water Needs; Water regularly; do not overwater

Sun Exposure
Full Sun

Foliage
Herbaceous

Foliage Color

Height
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

Spacing
24-36 in. (60-90 cm)

Hardiness
Not Applicable

Where to Grow

Danger

Bloom Color
Bright Yellow

Bloom Characteristics

Bloom Size

Bloom Time
Late Spring/Early Summer
Mid Summer

Other details
May be a noxious weed or invasive

Soil pH requirements

Patent Information

Propagation Methods
From seed; direct sow outdoors in fall

Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed