Vibernum located in drip irrigation shrub bed. Attached are two pictures of 'sick' portion of shrub and one picture of same shrub showing healthy portion. Sick leaves are not brittle but curled throughout. Soil is not overly wet, excellent soil, average sunlight. All other plants in area in healthy condition. Any suggestions of cause greatly appreciated. Regards, Verna
Since it's drip irrigation maybe emitter is not reaching part of root zone, corresponding branches then dying. Otherwise, when part of a shrub blights off the first suspect(s) will be water molds (Phytophthora etc.) rotting the roots. These are common.
