Also known as Annual Sunflower · Deceptive Sunflower · Kansas Sunflower
Prairie Sunflower (Helianthus petiolaris) is a wild sunflower species native to western North America, known for its adaptability and bright yellow flowers.
At-a-glance light, water, soil, and growing conditions from plant data
Full sun
100% intensity
Requires at least 6-8 hours of direct sunlight daily for optimal bloom production.
Moderate
50% intensity
Allow soil to dry between waterings. Drought tolerant once established.
Sandy, Loamy, Clay
50% intensity
Moderate
50% intensity
Prefers average to warm temperatures; hardy in USDA zones 3-9.
Low
25% intensity
Does not require heavy feeding; can thrive in poor soils. Light feeding in spring if desired.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
None
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Prairie Sunflower prefers well-drained soil and is drought-tolerant once established. Water deeply but infrequently, allowing the soil to dry out between waterings. Avoid overwatering, which can lead to root rot.
Monitor soil moisture, especially during prolonged dry spells, and water accordingly.
Pruning is generally not required for *Helianthus petiolaris*. Deadheading spent flowers can prevent self-seeding if desired, and may encourage a tidier appearance.
Remove any damaged or diseased foliage as needed to maintain plant health and prevent the spread of issues.
*Helianthus petiolaris* is easily propagated by seed. Sow seeds directly outdoors in early spring after the last frost, or start them indoors a few weeks prior.
Seeds require light stratification; a period of cold, moist conditions can improve germination rates.
Repotting is typically only necessary for nursery-grown plants or if you are starting seeds indoors. If transplanting seedlings, do so when they are a few inches tall.
Ensure the new container or garden location has excellent drainage and adequate space for root development.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Prairie Sunflower (Helianthus petiolaris)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Helianthus |
| Species | Helianthus petiolaris |
Similar in genus Helianthus
Answers based on plant encyclopedia data
