The answer to 'flower bed invasive plants' is that common invasive plants that can take over flower beds include weeds like crabgrass, bindweed, and creeping Charlie. These plants spread quickly, compete with your desired flowers for nutrients and water, and are difficult to fully remove.
The symptoms of an invasive plant problem are rapid growth, spreading into new areas, and your other plants becoming stunted or dying off. To solve this, you'll need to identify the specific invasive plants and use a combination of manual removal, smothering, and targeted herbicides. For severe infestations or difficult-to-control weeds, it's often best to call in a professional landscaper who can properly treat the problem.