Thread: cerin amroth
I think it probably is Galadriels Ring but it might be the blessing of the Vala who watched over Lorien in the Undying lands.
The Vala in Valinor is named Irmo, or Lorien after his garden, but he has nothing to do with Lothlorien of Middle-Earth.
It is indeed due to the power of Galadriel's Ring, Nenya, that Lothlorien is placed out of the flow of time and nothing in Lothlorien ever perishes or withers.
There are other stories that include a sacred grove upon a hilltop, i.e. The Mabinogion and The Wizard of Earthsea, among others.