Should we buy straight sand from one of the two suppliers in Ontario or should we consider an 80/20 mix with peat or something else?
Thank you for using the greens forum. Since your green is 99 percent soil, you should use pure wash sand. Never use an 80/20 mixture because if you do use that mixture you probably will have compaction at the end of your green.
I get my sand from Hutchinson Sand and Mixes and I order Bunker B sand. That's what most good golf courses use for the top dressing. Ask your local golf course greens keeper. He should be able to tell you where he gets his sand. I know some greens keepers are using a mixture, but I don't recommend anything but pure sand for the top dressing.
Hope this helps.