The answer to 'why is my hedge invasive plants' is that your hedge may have become overgrown with invasive plants, such as weeds, vines, or unwanted shrubs. This can happen when the hedge is not properly maintained and pruned on a regular basis.
Invasive plants can quickly take over a hedge, crowding out the desired plants and making the hedge look unkempt and overgrown. Common symptoms include the hedge appearing thicker and denser than it should, with a mix of different types of plants growing within it.