Gentiana asclepiadea (Willow Gentian, Milkweed Gentian)
Botanical Information
| Family | Gentianaceae |
| Genus | Gentiana |
| Species | asclepiadea |
| Category | Perennials |
Details
| USDA Hardiness Zone | 7b - 8a |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 7b |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H5 (Observed growing well in H7) |
| RHS Hardiness Ref. | |
| Temperature (°C) | -15 to -10 |
| Temperature (°F) | 5 - 14 |
| Height | 0.5 - 1 m |
| Spread | 0.1 – 0.5 m |
| Growth | Medium |
| Flowering Period | July, August, September |
Description and Growing Information
| General Description | Gentiana asclepiadea is a herbaceous perennial with arching stems, lance-shaped leaves and dark blue trumpet flowers. |
| Cultivation | Grow in shade, in moist but well-drained, humusy soil. Avoid chalky soils. Will tolerate more sun in cool, damp summer climates. |
| Pests | No serious pests or diseases of note. |
| Notable Specimens | Montreal Botanic Garden, Montreal, Quebec, Canada. Lanhydrock Gardens, Cornwall, England. |
Photographs
A mature plant growing well in the Montreal Botanic Garden, Montreal, Quebec, Canada.
Gentiana asclepiadea. Leaf, Lanhydrock Gardens, Cornwall, England.
Gentiana asclepiadea. Flower, Lanhydrock Gardens, Cornwall, England.
Gentiana asclepiadea. Autumn form, Lanhydrock Gardens, Cornwall, England.
Awards
