My wife planted some early lettuce and covered the rows with some
long grow tunnels. These are plastic
sheeting attached to hoops which are stuck into the ground; picture at link.
http://tinyurl.com/yx93hvun
These were fine until we had a couple of windy days, with wind
gusts up to 40 m.p.h, at which point
the one on the windward side was blown out of the ground.

It is hard to tell from that picture, but how is the sheeting
anchored along the length? I haven't used these, but normally see
the suggestion to bury the edge an possibly add extra weight (like
rocks or bricks).


No anchoring along the edge, it just rests on the ground.
Not enough excess for rocks, unfortunately. I think I'll try covering
the whole thing with wire fencing, which I have a roll of out back,
and weight the fencing with rocks.
Paul


This one is secured with ground stakes :

http://www.leevalley.com/en/garden/p...87&cat=2,33141

I would think that fencing would make it difficult to tend ?

John T.