1 / 2Key characteristics
- Family
- Gentianaceae
- Height
- 2-3 feet tall
- Width
- 1-2 feet wide
- Flower color
- Blue to purple, bell-shaped flowers
- Foliage color
- Deep green, lance-shaped leaves
- Bloom time
- Late summer to early fall
- Light
- Partial shade to full shade
- Water
- Medium
- Maintenance
- Low; may require occasional pruning
- Growing zone
- USDA Zones 5-7
- Wildlife
- Attracts bees and butterflies
Perennials
Gentiana asclepiadea
Willow Gentian
Gentiana asclepiadea, known as the willow gentian, brings an enchanting touch to the garden with its graceful, arching stems and deep blue to purple, trumpet-shaped flowers. Blooming from late summer into early fall, these blossoms appear in clusters along the stems, providing vibrant color when many other plants are winding down. The intense blue hue is a refreshing sight, adding richness to mixed borders and shaded areas.
Works well in
- Borders
- Shade Gardens
- Woodland Gardens
- Pollinator Gardens
- Cut Flower Gardens
Companion plants
Heucheras · Siberian bugloss · Sweet woodruff · Foamflowers · Epimediums · Hostas
Design tip
Late flowers extend the season, so set it behind or beside plants that finish in midsummer. 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 in the perennial border at the Bellevue Botanical Garden.
More perennials

Tradescantia virginiana
Virginia Spiderwort
Blooms blue to violet purple with yellow stamens
Full sun to partial shade

Salvia nemorosa ‘Caradonna’
Caradonna Meadow Sage
Blooms striking, vibrant purple-blue flowers
Full sun to partial shade

Iris douglasiana
Douglas Iris
Blooms variable shades including blue, purple, lavender, and white, often with darker veining and a yellow signal
Full sun to partial shade

Salvia x sylvestris 'May Night'
May Night Sage
Blooms deep violet-blue flower spikes with darker purple calyces
Full sun