The answer to 'why is my flower bed bare spots' is that there are several common causes, including lack of sunlight, poor soil quality, and competition from weeds or aggressive plants. Bare spots can also be caused by disease, pests, or damage from foot traffic.
To address bare spots, you'll first need to identify the underlying cause. This may involve testing your soil, removing weeds, or adjusting the amount of sunlight the area receives. In some cases, you may need to replant the affected area with new flowers or ground cover plants. If the issue persists or you're unsure of the cause, it's best to consult a professional landscaper for guidance.