How to secure crop covers eg Environmesh

I don't make holes in mine! Well, not deliberately anyway. I did get a few holes from having a bonfire on a breezy day 

I weigh mine down with planks, bricks and water filled bottles

You still have to force those though the mesh, though, as it's much finer than a coat hanger. The weighing down/digging in methods don't damage the mesh.

I roll the enviromesh edge in a metal tube and clip the material to it by using plastic pipe clamps that plumbers use. Stretch the material over a frame and repeat on the other side and ends, tuck the corners like a hospital bed and its job done. The tubes were old metal electric conduit and the clips were £2.99 for a bag of thirty. The weight of the conduit holds the fabric down in windy conditions and is easy to lift when I need to water / weed / harvest.
I did try the same method using bamboo canes and bricks as the weights, however the wind didn't think much of that and I ended up pegging the bamboo down, not always successfully. At the end of the season simply unclip, clean the enviomesh and store until required. :blink: