Q: I have zoysia turf that has developed dead spots along our
curb. It's done it before, and it took a long time to grow back
in. What can I do to eliminate the problem?  A: One of the most
likely causes would be inadequate water. It's difficult to
irrigate evenly along a curb, walk, drive or street because you
don't want water to drift onto the concrete, yet the grass grows
right up to it and needs the water.  If you have a sprinkler
system, examine the heads to see if they're aligned properly and
functioning perfectly. If you water by hand, invest in some type
of soaker hose to do the edges along the curb.  It's possible
that insects such as grub worms might have been involved, or
that there is shallow soil there that is also laden with
concrete right below the soil surface. Do a little more
detective work.   Q: We have a post oak tree measuring more than
10 feet in circumference in our yard. Recently I've noticed that
its leaves are getting smaller and smaller, and some branches
are not as well filled out