Asteraceae
Rudbeckia laciniata var. ampla
Rudbeckia laciniata var. ampla var. ampla
Also known as Rudbeckia ampla, Rudbeckia laciniata subsp. ampla, Obeliscotheca ampla
Flowering Plants · Native Plants · Western Coneflower · Rudbeckia · Native Perennial · Rocky Mountain · Part Shade · Wildflower · Pollinator · Yellow Flowers · Drought Adapted · Asteraceae
The western cutleaf coneflower is a robust Rocky Mountain native that adapts well to partly shaded garden sites from the high desert to mountain foothills. Keep soil consistently moist, watering weekly in warm weather, and apply mulch to conserve moisture in arid western climates. This tall, vigorous perennial produces bright yellow blooms that attract a wide variety of pollinators including bees, butterflies, and hummingbirds.
Growing conditions
The details behind the basics
- Daily light
- 5 hours
- Watering
- Water deeply until soil is moist, then allow top inch to dry between waterings · Every 7-10 days
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 4.5–7
- Temperature
- -10°F to 85°F
- Cycle
- Perennial
Hardiness
USDA 5a-9b
Form & growth
Mature size and habit
- Mature height
- 18 in – 3 ft
- Spread
- 2 ft
- Spacing
- 24 in apart
- Growth rate
- Fast
- Root depth
- Medium
- Flowers
- Yes
- Foliage
- Coarse
Ecology & origin
Where it belongs and what it brings
- Native to
- Arizona, British Columbia, Colorado, Montana, New Mexico, South Dakota, Wyoming
- Attracts
- Bees, Butterflies, Hummingbirds, Birds
Sources: trefle, usda
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