Ageratina occidentalis
- Families: Asteraceae Asteroideae Eupatorieae
- English name: Western snakeroot
- Plant ID : 17148
- Author : (William Jackson Hooker (1785-1865)) Robert Merrill King (1930-) & Harold Ernest Robinson (1932-)
- Zone : California
- Biological type : plant
- Adult size (h x w) : 2,30f x 1,97f
- Sun exposure : part sun
- Evergreen : evergreen
- Growth : fast
- Hardiness : 19,4°F
- Leaf color : dark green
- Flower color : pink
- Formerly of wild origin : no
- Native : no
- In danger : no
- Edible : no
- Precipitation : > 900mm
- FrostResistance >-5°C : yes
- Gravelly soil : very much
- Sandy soil : very much
- Humus soil : a little
