| Scientific Name: | Ageratina altissima 'Chocolate' |
| Common Name: | white snakeroot |
| Family Name: | Asteraceae |
| Origin: | Garden origin, U.S. - northeast |
| Hardiness Zone: | Zone 4: (-34 to -29 °C) |
| Plant Type: | Herbaceous perennial |
| Mature Size: | 0.7 - 1.3m x 0.6 - 1.0m (height x width) |
| Habit: | Upright |
| Form: | Oval - vertical |
| Texture: | Medium - coarse |
| Landscape Uses: | Perennial border, Summer interest, Woodland margin |
| Exposure: | Full sun |
| Soil or Media: | Humus rich, Well-drained |
| Leaves: | Simple, Opposite, Soft flexible, Heavily veined, Pinnate venation, Glabrous, Ovate, Serrate |
| Flowers: | Head (capitulum), White, Aug-Sep-Oct |
| Fruit: | Cypsela (achene + calyx), Silver, Sep-Oct |
| Key ID Features: | |
| Leaves opposite, dark green, lanceolate to elliptic-ovate (like stinging nettle), most blades 6-1(-15)2cm long x 5-9cm wide; margin serrate, apex acuminate, most petioles 3-6cm long; heads small and fluffy, bright white disk florets only (rays florets absent), arranged in loose corymbs 7-10cm across. | |