Posted: 24/07/2012 at 09:35
This has always confused me, as we're told sandy soils drain too quickly, clay soils too slowly etc.
We dug in one of those enormous ton bags of sand, no idea what kind, when we enlarged our big border & the plants all seeem very happy. I've read many times since that sand doesn't help drainage, it's grit that does.
Also lots of seed or cuttings mixes I've read suggested half soil, half sand & the clematis montana cuttings I did a month or two ago for a friend in this mix have been successful. Could just be that montana is un-killable, even for me!
My guess is that sand holds water for a bit, but not much & not for very long.