The answer to 'landscape design yellowing' is that there are several common causes for yellowing plants or grass in a landscape design, including overwatering, nutrient deficiencies, disease, or pest infestations. Symptoms can include leaves turning yellow, wilting, or the entire plant appearing unhealthy. To address the issue, you'll need to diagnose the underlying cause and take the appropriate corrective action.
If the yellowing is due to overwatering, reduce the frequency of watering and ensure the soil is draining properly. For nutrient deficiencies, apply the necessary fertilizers or soil amendments. If disease or pests are the culprit, you may need to treat the plants with fungicides or pesticides. In some cases, replacing affected plants may be necessary. If you're unsure of the cause or how to fix the problem, it's best to consult a professional landscaper or horticulturist.