Song is called "To People Who Have Gardens" It was written by Agnes Mure Mackenzie of Stornoway.I have it in a small book which probably dates from the late '50s or early '60s I believe that it first appeared in a publication called "The Sphere and The Graphic"
We recorded it about 10 or 12 years ago, after hearing The McCalmans do it.
Hope this is of some help.