Yews are typically very hardy plants, and are not susceptible to many diseases. However, several stress factors can cause yews to turn brown. Yews don’t like “wet feet” and can develop root problems if their roots are kept too wet.Click to see full answer. In this manner, do yews need sun?Growing yews can be achieved in zones 4 through 8. While this evergreen shrubs flourishes in sun to partial sun and well drained soil, it is tolerant of most any exposure and soil make up with the exception of overly wet soil, which may cause root rot. are yews shade tolerant? Growing Japanese yew: Yews are perfectly tolerant of moderate shade, and even deep shade, as long as they get some spring sunlight. In dense shade, the shrubs need harsher pruning to help fill in the gaps formed by a more open growth pattern. Yews need fertile soil and ample moisture. Also asked, do yews like sun or shade? Yew is a fairly fast growing plant when it is young. It will easily grow 30cms per year, more if it is in full sun all day and well cared for. Yew will begin to grow slowly when the growing tips of the central, leading stems are cut.What causes yews to die?Yews are notorious for quickly yellowing and dying in wet or water-logged soil. Even a brief period of water-logged soil can result in root rot and plant death. Dieback has been associated with yews growing in very acid soils (pH 4.7-5.4) or very alkaline soils (pH over 7.5).