Pete C wrote:
Tonight, Tony Buckland was using horticultural grit on the top of some pots
of bulbs. What is the difference between this grit and any other
grit/gravel?

It's a damn sight more expensive...

PS: Diagnosis complete, I have Japanese knotweed in my garden.

Regards

--
Alan Johnson, Geotr@ns
www.geotrans-online.de
German-English, Geosciences/Technical
http://geotransblog.blogspot.com/
Terminus Est