PatternBaseThinleaf Sunflower
Helianthus decapetalus, Asteraceae
Zones
4–8
Layer
Herbaceous
Lifespan
Perennial
Growth
Fast
Guild Roles
Pollinator AttractorBeneficial Insect HabitatPest Confuser
Growing Conditions
Sun
Partial Shade (preferred)Full Sun (tolerated)
Water
Moderate (established)High (seedling)
Soil pH
6 – 7.5
Tolerances
Drought
Frost
Heat
Pest Resistance
Disease Resist.
Companion Plants
Antagonistic Plants
Giant Spider FlowerCleome spinosa
Both Giant Spider Flower and Thinleaf Sunflower are tall, fast-growing annuals that compete intensely for light resources.
Tall CoreopsisCoreopsis tripterisSunflowers produce strong allelopathic compounds that inhibit growth of other tall Asteraceae including Coreopsis species
Rocky Mountain GoldenrodSolidago multiradiataSunflowers are well-known for producing allelopathic compounds that suppress goldenrods and other Asteraceae
Giant Cutleaf ConeflowerRudbeckia laciniata var. amplaGiant cutleaf coneflower and thinleaf sunflower may compete for light and exhibit allelopathic effects
Uses
Functions
Attracts Native Bumble BeesSupports Assassin BugsLate Summer Nectar AbundanceHabitat For Beneficial LacewingsSeeds For Native Birds
Edible Parts
TubersSeeds
Medicinal Uses
Traditional Respiratory Support
Common Questions
What zones does Thinleaf Sunflower grow in?
Thinleaf Sunflower grows in USDA hardiness zones 4 through 8.
What are good companion plants for Thinleaf Sunflower?
Good companions for Thinleaf Sunflower include Velvet Bundleflower, Mountain Black-eyed Susan.
Design guilds with Thinleaf Sunflower and see companion relationships visually.
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