Northwest Blooms · Perennials
Astilbe japonica 'Washington'
Washington (japonica) Astilbe

- Family
- Saxifragaceae
- Height
- 24-30 inches tall
- Width
- 18-24 inches wide
- Flower color
- Pure white, fading to pale buff
- Foliage color
- Glossy dark green, deeply divided leaves
- Bloom time
- Early to mid-summer
- Light
- Partial shade to full shade
- Water
- High
- Maintenance
- Low; remove spent flower heads and cut back in late fall or early spring
- Growing zone
- USDA Zones 4-9
- Wildlife
- Attracts bees and butterflies
About this plant
Astilbe japonica 'Washington' produces elegant plumes of pure white flowers, bringing a soft yet bright presence to shaded garden areas. Blooming in early to midsummer, the pristine flower clusters rise above dense, finely textured green foliage, creating a graceful and layered appearance. Originally developed for garden versatility, this cultivar combines well with other shade-loving plants, adding depth and luminosity to borders and woodland settings.
The delicate, feathery blooms maintain their form as they age, slowly turning a pale buff color, extending visual interest into late summer. 'Washington' is especially valued for its ability to create lush, full displays in low-light spaces, where its clear white flowers light up shaded corners. Ideal for fresh-cut arrangements, the long-lasting plumes also work beautifully as dried floral accents, making it a charming addition both indoors and out.
Works well in
Borders · Shade Gardens · Woodland Gardens · Pollinator Gardens · Rain Gardens
Companion plants
Hostas · Bleeding hearts · Solomon's seal · Ferns · Lungworts · Wild ginger
Design tip
The long summer show pairs well with plants that peak earlier, keeping one area interesting for months. Keep it out of hot afternoon sun and layer it with woodland companions for a full, settled look.
Where to see it
This plant can be seen at the Center for Urban Horticulture.
