I wonder if that would also remove the white scale that sometimes builds up on my raised bed walls (concrete paving stones stood on end)?
I assume it comes from some dissolved salts diffusing through the pavers, and being left behind when water evaporates from the surface.
BTW, I recently noticed (when I crawled under my bamboo) that no shoots were coming up right near the walls of the bed. I often let that patch go un-watered, and I speculate that the edges dry out so often that the roots don't grow into that zone.
When I have time, I think I'll line those RB walls with heavy plastic, to keep that RB from drying out so fast around the edges. It is a shallow layer of half-decent soil over clay, so it probably doesn't retain much water.
2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . March 2013, before growth spurt
