You may expect the whole canopy to change at about the same time each fall. When one side turns yellow, orange, or red while the other side stays green, part of the plant may be receiving less water, nutrients, or structural support. Root stress, branch damage, disease, insects, or different growing conditions can all cause this uneven pattern. You should not assume that early colour means the entire plant is dying. Sunlight, drying wind, artificial light, and natural growth patterns