I first heard the song by Ralph Stanley and the Clinch Mt. Boys in y early childhood (early 70's). He appears to have cut it with Roy Lee Centers as the lead vocal around the 1971-1973 time frame. Beautiful arrangement. Not sure what the Albert Brumley orginal sounded like (yet) but Ralph and the boys did a wonderful ole' time recording on it.
Here's a sample from amazon, who resells the CD Set/MP3s.

The Prettiest Flowers Will Be Blooming

I still own the LPs in this set ... the good stuff :)