Dense clumps of robust, evergreen leaves <60cm high from bulbs. Light blue or white tubular composite flowers.
Bluffs, coastal cliffs, roadsides, stream banks. Prefer sun or semi-shade, frost tolerant.
Seeds, garden waste dumping.
Forms dense mats especially on coastline. Can exclude all other vegetation.
Hard to kill. At least 2-3 follow-up treatments needed. Begin eradication at top of banks or stream & work down. Remove flowerheads early summer to stop seed dispersal. Don’t replant until after 2-3 treatments. Attempt to clear local gardens, especially on the coast.
1. Dig out isolated plants, removing all bulbs/rhizomes.
2. Slash leaves close to ground & paint fresh stump (Vigilant gel or triclopyr 100ml/L or Yates Hydrocotyle Killer 500ml/L or glyphosate 250ml/L or metsulfuron 10g + 20ml penetrant/L).
3. Spray (60ml triclopyr + 20ml penetrant/10L).
Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.