Is Bush Sunflower good for the Colorado Front Range?

Yes, Bush Sunflower is a well-suited perennial for Colorado's Front Range.

What should I know before planting Bush Sunflower?

The main things to know: Spreads via rhizomes; moderate in dry sites

How far apart do I plant Bush Sunflower?

Space Bush Sunflower about 13 in apart for a faster, fuller bed, or up to 18 in apart for a looser planting.

Is Bush Sunflower hardy on the Front Range?

Bush Sunflower is hardy in USDA 4 to 9. The Colorado Front Range spans roughly USDA 4b to 6a, so it is well within range.

How much water does Bush Sunflower need?

It needs low water once established.

Is Bush Sunflower deer-resistant?

No. Deer often browse Bush Sunflower, so plan on protecting it where deer roam.

How long does Bush Sunflower bloom?

Bush Sunflower blooms for several weeks, a long-season performer on the Front Range. Bloom timing shifts a week or two with elevation and spring weather.

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Bush Sunflower

Helianthus pumilus

Compiled by Nicholas Julia · Reviewed against CSU Extension & Plant Select® · Updated 2026-10-30

Bush Sunflower (Helianthus pumilus) is a Colorado-native perennial suited to the Colorado Front Range. It matures to about 20 in tall and 18 in wide, needs low water, and prefers full sun. CO native perennial; supports pollinators.

Colorado nativeOn the CSU listlow water20 in tall and 18 in wideXeric / water-wise

Photos

Photo 1: Jeff Birek https://www.inaturalist.org/people/jefsilentf, Wikimedia Commons (CC-BY)
Photo 2: Jeff Birek https://www.inaturalist.org/people/jefsilentf, Wikimedia Commons (CC-BY)
Photo 3: Jeff Birek https://www.inaturalist.org/people/jefsilentf, Wikimedia Commons (CC-BY)

At a glance

Will it survive here?

Hardiness zones: USDA 4 to 9
Water needs: low water
Sun: Best in full sun.
Soil: clay, loam, sandy
Soil pH: 6.5 to 8.0
Hail tolerance: high
Wind tolerance: high
Salt tolerance: moderate
Site uses: Slopes & erosion control

How big, what shape?

Mature size: 20 in tall and 18 in wide
Planting spacing: ~13 to 18 in apart

What it looks like, and when

Bloom time: mid summer, late summer
Bloom color: yellow
Bloom length: Long (several weeks)
Foliage: Deciduous

Who else benefits

Pollinator value: high
Deer: Deer often browse this
Colorado native: Yes
Native ecoregion: shortgrass prairie, foothills

Also worth knowing

Fire rating: Not rated

Things to know before you plant

Spreads aggressivelySpreads via rhizomes; moderate in dry sites

Planting & establishment

Native perennial; deep-water first season to establish, then minimal water needed.

Frequently asked questions

Is Bush Sunflower good for the Colorado Front Range?: Yes, Bush Sunflower is a well-suited perennial for Colorado's Front Range.
What should I know before planting Bush Sunflower?: The main things to know: Spreads via rhizomes; moderate in dry sites
How big does Bush Sunflower get?: It matures to about 20 in tall and 18 in wide.
How far apart do I plant Bush Sunflower?: Space Bush Sunflower about 13 in apart for a faster, fuller bed, or up to 18 in apart for a looser planting.
Is Bush Sunflower hardy on the Front Range?: Bush Sunflower is hardy in USDA 4 to 9. The Colorado Front Range spans roughly USDA 4b to 6a, so it is well within range.
How much water does Bush Sunflower need?: It needs low water once established.
Is Bush Sunflower native to Colorado?: Yes. It is a Colorado native.
Is Bush Sunflower deer-resistant?: No. Deer often browse Bush Sunflower, so plan on protecting it where deer roam.
How long does Bush Sunflower bloom?: Bush Sunflower blooms for several weeks, a long-season performer on the Front Range. Bloom timing shifts a week or two with elevation and spring weather.