American Feverfew
Parthenium integrifolium

Quick-Care Snapshot
Height: 2-4 ft
Spread: 18-24 in
Growth Rate: Slow
Maintenance: Low
USDA Zones: 4-8
Sunlight: Full Sun
Soil Type: Loam, Clay
Moisture:
Bloom Time: Jun, Jul, Aug
Bloom Color: White
Flower Shape: Composite
Foliage Color: Green
Wildlife Value: Pollinators
Native Range: Great Lakes, Midwest
Overview
American Feverfew is a sturdy native perennial with upright stems, bold green foliage, and flat-topped clusters of creamy white flowers that bloom in early to midsummer. It thrives in full sun to part shade with medium to dry, well-drained soils, develops a deep root system, and adds strong structure and early-season pollinator value to prairie plantings.
Why You’ll Love It
- Low-maintenance: durable, long lived, and tolerant of heat and drought once established.
- Pollinator-friendly: flowers attract a wide range of native bees and beneficial insects.
- Structural form: upright habit and broad leaves provide contrast among finer-textured plants.
Ideal Site & Soil
- Sun first: full sun supports the strongest growth and best flowering; partial shade is acceptable.
- Drainage matters: prefers medium to dry, well-drained soils; avoid wet or poorly drained sites.
- Lean soils: performs best without fertilizer.
Planting Steps
- From pots: plant at soil line, water deeply to settle roots, and space 18 to 24 inches apart.
- From seed: fall sow or cold stratify before spring planting; flowering often begins in year two.
- Root tip: choose planting location carefully and minimize disturbance.
Care Routine
- Watering: consistent moisture during the first growing season; drought resistant once established.
- Feeding: skip fertilizer to maintain upright form.
- Cut back: leave stems standing through winter, then cut back in early spring.
- Divide: rarely needed; plants prefer to remain undisturbed.
Design & Companions
- Prairie anchors: pairs well with Prairie Dock (Silphium terebinthinaceum), Purple Coneflower (Echinacea purpurea), and Little Bluestem.
- Early bloom support: bridges the gap between spring flowers and peak summer prairie blooms.
- Background plant: works well in mid-to-back border placements.
Common Mistakes
- Overwatering: causes weak growth and reduced longevity.
- Excess fertility: leads to floppy stems.
- Too much shade: reduces flowering and vigor.
Quick Troubleshooting
- Flopping stems: reduce soil fertility and increase sun exposure.
- Few flowers: ensure lean soil and adequate light.
- Slow establishment: normal; deep roots take time to develop.
Where It Fits Best
American Feverfew fits best in sunny borders, prairies, and meadow plantings where strong structure and early-summer blooms are needed. It is especially effective in native landscapes that emphasize durability, pollinator support, and long-term stability.



