The answer to 'why is my flower bed weeds' is that flower beds can become overrun with weeds for several common reasons. Weeds thrive in the nutrient-rich soil and moist conditions that flower beds provide, and they can quickly spread and outcompete your desired flowers if left unchecked. Lack of proper mulching, infrequent weeding, and poor soil preparation are often the main culprits.
To get your flower bed back under control, start by thoroughly weeding the area and removing all visible weeds, including the roots. Then, apply a 2-3 inch layer of organic mulch like wood chips or bark to block sunlight and prevent new weed seeds from germinating. Be diligent about regularly weeding and maintaining the mulch, as weeds can still find ways to break through. You may also need to amend the soil with compost or fertilizer to improve the growing conditions for your flowers and make it harder for weeds to take over.