“What is a weed? I have heard it said that there are sixty definitions. For me, a weed is a plant out of place.”
Donald Culross Peattie, (1896 -1964).
After my recent faux pas with Lilium formasanum, I was contacted by Carolyn Lewis, the national coordinator of Weedbusters, an organisation with support from many interested parties, dedicated to raising awareness of the problem weeds in this country. Too many of these are garden escapes and gardeners need to take some responsibility for unleashing vegetable time bombs. The website http://www.weedbusters.org.nz gives extensive information on individual weeds including how to eradicate each species in your area and useful suggestions of alternative plants to use instead.
Weedbusters are not covering the plants included in the National Pest Plant Accord (which are the banned ones) although there is a link through to the Ministry for Primary Industries section on these agreed pests. Some of the inclusions surprise me (Bartelttina sordida for one), others don’t. The arum lily, aristeas and agapanthus are widely recognised as problematic. I would have liked to have seen more information on where these plants are problems (national, regional or specific to just one area) because one region’s weed can be another region’s valued garden plant.
Without becoming too paranoid, take notice of those that seed down too freely or spread rampantly in your domain. If they are popping up all round the place, threatening to invade well beyond their allotted space and choking out other plants, or are extremely difficult to eradicate then you are probably looking at plants with significant weed potential for your conditions. While purists may advocate total eradication, in some cases we choose to manage such plants. We don’t want to be without our campanulata cherries that feed the tuis but we take responsibility for the seedlings and are vigilant weeders. The vegetable garden is not exempt either. We rated strawberry spinach as downright dangerous and went for eradication.
We don’t need more weeds in this country.
First published in the Waikato Times and reprinted here with their permission.