I have two shrubs which seem to be growing on one half of the bush but still dormant on the other. One is a Leather Leaf Viburnum. The other is a Dwarf Korean Lilac. When I scratch twigs on the dormant areas, I see bright green inside.
There are no obvious signs of distress.
Both shrubs have been growing here for about 7 years. There is a second bush of each variety nearby which is growing normally.
Could our severe drought conditions be the cause?
Or maybe the warm winter and hot early spring has them completely confused.