The answer to 'why is my fence invasive plants' is that invasive plants can grow along and through fences, causing damage and spreading quickly. Invasive plants like ivy, vines, and certain grasses can take root in the soil around the fence posts and work their way up and through the fence material, weakening the structure over time.
The main symptoms are seeing plants growing up the fence, gaps or holes forming in the fence, and the fence becoming unstable. To solve this, you'll need to regularly inspect the fence and remove any invasive plants you find. For severe cases or hard-to-remove plants, it's best to call in a professional landscaper who can properly treat and manage the invasive species.