The Site Gardener

Plant Library

Explore 4,545 plants, with photos and growing details.

Back to Tools

← Back to plant results

Astilbe 'Key West'

Astilbe, False Spirea, Key West False Spirea

A bold, shade-loving perennial featuring vivid rose-pink flower plumes held above glossy green foliage. ‘Key West’ is valued for its strong color saturation and upright habit, making it an excellent choice for adding brightness and structure to shaded borders and woodland gardens.

Key features



Width: 18–24 in (1.5–2 ft)



Height: 22–30 in (1.8–2.5 ft)



Flower color: Bright rose pink



Bloom time: Early to mid summer



Foliage: Dark green, finely divided, glossy



Form: Upright, clump-forming



Life cycle: Herbaceous perennial



Growing conditions



Sun: Part shade to full shade (handles morning sun with adequate moisture)



Soil: Moist, rich, well-drained; prefers humus-rich soils



Water: Moderate to high; soil should remain consistently moist



Hardiness: USDA Zones 4–8



Landscape use



Shade and woodland gardens



Perennial borders



Mass plantings for strong color impact



Along ponds and streams



Containers in shaded locations



Notes



Excellent cut flower



Generally deer resistant



Foliage remains attractive after bloom



Strong color stands out in low light conditions



Performs best with consistent moisture

Plant type
Perennial
Height
24-30''
Width
18-24"'
Hardiness zones
4–9
Sunlight
Full Sun, Partial Shade
Bloom time
Early Summer, Late Summer, Summer
Flower color
Pink, Red, Rose, White
Fall color
Bronze, Green
Attracts
Butterflies, Hummingbirds
Soil
Loamy, Well Drained
Landscape use
Accent Plant, Border, Container, Mass Planting
Shape
Broad Upright, Upright
Deer resistant
Yes
Drought tolerant
No