garden
Rudbeckia
Rudbeckia amplexicaulis
EdibleMedicinalNative to N. America
Overview
The black-eyed Susans and their relatives are among the most cheerful and reliable native perennials, producing masses of golden-yellow daisy flowers from midsummer through fall. They are virtually indestructible, thriving in heat, drought, poor soil, and neglect. Rudbeckia is a keystone native plant that supports numerous butterfly and bee species while providing seeds for goldfinches.
Growing Conditions
LightFull Sun
MoistureModerate
Hardiness Zones3 — 8
Height499.87m
Spread0.63m
Growth HabitForb/herb
LifespanPerennial
Pollinator Valuemoderate
Companion Planting & Soil
Good Companions
Soil pH5.5 — 7.5
Soil TypeAverage, well-drained soil; extremely adaptable
Planting Calendar
When to sow, transplant, and harvest by growing zone.
| Zone | Action | Months | Notes |
|---|---|---|---|
| Moderate (5-7) | Transplant | Apr — May | Plant in spring; Black-eyed Susan is low-maintenance |
| Moderate (5-7) | Divide | Mar — Apr | Divide every 3-4 years to maintain vigor |
Uses
Medicinal
- Root tea used traditionally by Native Americans for cold and flu symptoms
- Echinacea-like immune-stimulating properties in some species
Other Uses
- Long-blooming native pollinator plant
- Seeds provide winter food for goldfinches
- Tough, drought-tolerant perennial for low-maintenance gardens
