[WG.]

probably true, but if the slit trench should be dug to a hip depth, surely it matters very little whether the bed is raised or not ?

Precisely, 'cos you won't have any roots to worry about.

[Ice]

My next door neighbour has a conifer hedge that runs the length of my veg patch.  It is 30 feet long, 4 feet deep and 10 feet high, the hedge that is.  How can I kill the f*****g thing and get away with it?  :cry:  That would save all the effort of digging out roots.

[WG.]

How can I kill the f*****g thing ...

Drill a hole in the trunk and pack with sodium chlorate, plug with a wine cork while you can still get 'em

... and get away with it?

Trickier