The answer to 'why is my garden dying plants' is that there are several common causes, including overwatering, underwatering, poor soil quality, pests or diseases, and lack of sunlight. Symptoms may include wilting, discolored leaves, stunted growth, and rotting roots. To solve the issue, you'll need to identify the specific problem and take appropriate action.
If you're unsure of the cause, it's best to have a professional landscaper or horticulturist inspect your garden. They can diagnose the problem and recommend the right solutions, whether that's adjusting your watering schedule, amending the soil, treating for pests, or providing more sunlight exposure. Trying to fix the problem yourself without properly identifying the root cause can often make the situation worse.