My new landscaping is only two years old, and many of the yews and boxwoods are turning brown and are dieing. Why?
A. Sounds like over-watering. The first five years of a new planting are critical for proper watering. Trees and shrubs can drown very easily before they become established, if the fine feeding roots sit in water too long without getting oxygen they will collapse and stop taking up water. Most people think because the plant is turning brown it needs more water, so they water and the plant dies quicker. Clay soil is also a large contributer to this problem.