Invasives 2018-03-17T23:20:13+00:00


Invasives are plants, vines, shrubs and trees, that are spreading in such a way, that they deprive whole areas from their natural vegetation. Many invasives are exotic plants, introduced for our gardens or per accident brought here from another continent. These exotic species have little or no relation with our wildlife and can spread undisturbed. It can take many years before insects and animals will adapt to these species. Invasives cause loss of biodiversity, habitat degradation and other ecological and economical consequences. Invasive can be invasive in some areas, yet modest or non existent in others depending on their specific needs.
The strategy we need to fight these invasives is basically the same as the strategy against garden weeds. Yet invasives require more urgent and immediate action, not just by homeowners but also by municipalities and park managers.

Weeding and the managing of invasives is a important practice for landscapers who want to offer more sustainable practices. The more frequent visits that were necessary for conventional lawn maintenance,  can be replaced with weed management, which requires more time but can be done less frequently.
Weeding  of invasive perennials needs to be done when the soil is still soft and the plants still easy to pull, Annuals can be weeded later, after growth but before flowering and seeding.
Another way to make economic use of time as a landscaper is to do the weeding on those days, when the ground is too wet for mowing.

Garlic Mustard

Japanese Stilt Grass

Rosa Multiflora

Japanese Honeysuckle

Oriental Bittersweet

Porcelain Berry



Burning Bush

Japanese Barberry


Knot Weed

It is tempting to save time with an fast spreading groundcovers. But not all groundcovers create a healthy habitat. They can become invasive, and once the have started to grow they are often very difficult to remove. Exotic species like japanese pachysandra offer little wildlife value, but can become habitats for more resilient bugs, like ticks and mosquitos. Try to find alternatives for the following groundcovers, or make sure they remain contained:

Jap. Pachyssandra

English Ivy


Bishop’s Weed

Bugle Weed

Yellow Lamium