Strong-smelling, erect shrubs <3 tall. Large, downy, soft, broad, oval leaves with coarsely toothed edges; pointed tips on P. ecklonii & rounded tips on P. grandis; Leaves of P. grandis are much larger than P. ecklonii. Erect flower spikes (loose on P ecklonii & dense on P grandis) covered with blue-purple flowers Dec-May). Tiny brown ‘nutlets’ (autumn).
Very shade tolerant, grows in native forest margins or in disturbed forest. Frost- tender.
Limited local spread by seeds. Mostly spread from stem fragments due to dumping.
Shades out lower native vegetation & scrambles over other plants. Prevents establishment of many native species. Dense growth restricts access to bush areas.
Easy to control. Follow up within 3-6 months to kill resprouted stems. Replant bare sites.
1. Grub out small plants removing all stem fragments.
2. Cut & stump paint larger infestations (200ml glyphosate/1L or 1g metsulfuron/1L or 100ml triclopyr/1L).
3. Spray all year round (100ml glyphosate + 20ml penetrant/10L or 2g metsulfuron + 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.