If you can imagine a panelled fence (the type with wooden panels that slot into concrete posts) around 40 foot long and 5 foot high. I wish to fix willow all the way along one side of the fence but it will be around a foot taller than the panelled fence itself. Given that we have had some bad winters of late and I only have one side of the concrete posts to work with I wish to secure it very firmly the posts. Could anyone suggest the best way to do this please.