I have installed a water butt to collect the rain water from a
flat felted roof over the garage. (Only place I could get to a
downpipe that would not obstruct access).

Now the butt is full, water coming out quite yellowish, so I am
concerned that may be roof felt may contain things harmful to
plant - particularly in my case orchids.

Any one know?


--
Roger T

700 ft up in Mid-Wales

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