The answer to 'flower bed turning brown' is that there are several common causes, including drought, disease, pests, or poor soil conditions. The symptoms may include wilting, discoloration, or dead patches in the flower bed. To solve the issue, you'll need to identify the underlying cause and take appropriate action.
If the problem is due to drought, you'll need to increase watering. For disease or pest infestations, you may need to use appropriate treatments. If the soil is poor, you can amend it with compost or other nutrients. In some cases, it may be necessary to replant the flower bed entirely. If you're unsure of the cause or how to address it, it's best to consult a professional landscaper for guidance.