On Mon, 07 Nov 2005 18:58:44 +0000, Ron Clark wrote:


I reckon that a lot of it is common-or-garden moss, especially that
growing between the panes and the aluminium struts,

I reckon you're right there, especially on the greenhouse.

At the end of the season I spray with a proprietary moss killer and
pressure hose a couple of weeks later, It comes back next season but
this does seem to control it. I expect that Weedol or similar
could be used to the same effect. Kill it and flush it.

I will have a go.