Trees which are late to leaf out/bloom
I have noticed over the years, that some trees are late to leaf out in the spring. For a few, it just seems to be in their nature in that they are late every year. For others it is a one off type of thing. On some they will leaf out at the normal time on one or two of the lower branches, but wait a few weeks to do the same further up the tree.
My assumption is that these delayed and partial leaf-outs are a sign of stress in the tree. Something didn't go their way over the winter and they are struggling in the spring.
But I just thought I would check here. Is there any more knowledge about what causes this in fruit trees (apples, pears, plums)? Anything which can be done to prevent it?