Tree Lupin

Family:
Fabaceae
Origin:
California

General description

Hairy, soft-wooded perennial shrub <3m high. Grey-green leaves hairy underneath divided into 5-11 leaflets. Spikes of light yellow, pea-like flowers (Oct-May) form seedpods.

Sand dunes, riverbeds, roadsides.

Seeds spread from exploding pods.

Nitrogen-fixing changes soil fertility of natural areas. Previously used to consolidate sand & before planting exotic trees. Out-competes native species, harbours animal pests.

Site management

Control probably only necessary in low-growing plant communities, e.g. coastal dunes.

Recommended approaches

1. Dig out small infestations removing deep taproots.
2. Cut & stump paint tall plants
(200ml glyphosate/1L or 1g metsulfuron/1L or 100ml triclopyr/1L).
3. Weed wipe, all year round (300ml glyphosate +2ml penetrant/1L or 1g metsulfuron + 1ml penetrant/1L or 200ml triclopyr +1ml penetrant/1L).

Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.

RPMS status

Not a legally declared pest plant
tree lupin - Main species image