Strong growing, clump-forming, perennial shrub <2m tall. Stout stems soft-wooded & hollow. Huge, greyish, strong-smelling frond-like leaves <1m long divided into folded, toothed leaflets. Dark reddish-brown, foul-smelling flowers (Jul-Apr) on end of long flower spikes. Inflated papery seedpods, sharply angled.
Gardens, waste areas, roadsides, harbour margins, sand dunes.
Seeds spread through estuaries & waterways to harbour margins. Locally spread by creeping, suckering root system. Dumping.
Forms a dense cover of 2m in open conditions & impedes regeneration under 50% canopy cover. Competes with understorey natives under tall kanuka/mänuka forest. Toxic to stock.
Livestock shun because of taste & poison, however will eat wilting leaves. Plant invades grazed sites, therefore exclude livestock at all times, esp. when controlling weed.
1. Dig out small plants disposing of roots.
2. Cut & stump paint (5g metsulfuron/1L or 200ml Tordon BK /1L). Follow-up on suckering shoots continuously.
3. Spray large sites spring - summer (5g metsulfuron +10ml penetrant/10L or 60ml Tordon BK+10ml penetrant/10L).
Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.