plasterboard residue

[Rinaldo]

I had some use plasterboard sitting around on the paving stones in my garden for a while. It has all been cleared up now but the paving stones seem stained white. I tried to scrub it off with a sweeping brush and a bucket of water but that doesn't seem to be very effective. Can anybody give me a tip on what will get rid of this?

[Michael Mcneil]

Time and weather. Or less time and this weather.

It is a good fertiliser for clay soils, wouldn't harm sandy ones and makes no impact on lime soils. It will colour with age rub some sandy peat over it.

Or peaty sand.