I noticed a few days ago that the young saplings started unfolding their leaves already(except for the one in my pot outside, maybe frozen soil is preventing the growth of leaf buds for that sapling for now). Night temperatures have been below freezing while day temperatures have been above freezing. The trees are sugar maple, white oak(i think so at least), and elm(not sure at all what kind). I am in Columbus Ohio.
Is this normal for the leaves to start unfolding on saplings before the last frost? Is this freeze thaw cycle corresponding to day night cycle in March not a problem for saplings unfolding their leaves or is it a big problem with the potential of having the leaves frozen off? No new branch growth yet.