We have an older established tree whose roots are starting to grow above the
surface of the lawn. We have been told that we need to cover the roots with
soil to protect the tree's health. We would like to do this soon, but are
unsure what to plant once we have put the soil down. The lawn is St
Augustine, I have been told this grass will only grow from sod, and should
be put down in the spring. What can I plant temporarily to keep soil in
place that is cheap-- as I will replace it in the spring, but I want it to
be at least presentable till then. Thanks!