Periwinkle is a rapidly growing, perennial, scrambling ground cover weed. It forms rhizomes and long trailing stems that root where they touch the ground. This is a very difficult weed to get rid of.
Cut down periwinkle and immediately apply INVADE GEL to all cut ends to kill root systems effectively.
Small patches can be dug out but ensure all roots are removed as these will re-sprout. Dispose of plant material at a refuse transfer station or burn. Check for regrowth.
Periwinkle rarely produces seeds in New Zealand but is easily spread by vegetative reproduction where small pieces will readily root and grow.
The species of periwinkle common in New Zealand are:
Vinca or European periwinkles