So I'm looking at perhaps 200-300 shrubs. That's enough for one whole row around the boundary, (in a two-row hedge). According to the RHS, it '[w]ill become leggy in rich soils'. It's a legume, and fixes nitrogen, but can acidify the soil. I might need to deal with that once it's established, maybe with lime.
I can't imagine how 'leggy' gorse will look. It's going to take some management, but will be worth it in wildlife terms. Here's a photo from Warwickshire, with a fairly formal gorse hedge on the edge of a cultivated garden, so presumably fairly good soil. And it looks as if it's responding to management, regular pruning. A hedge like that, couple of feet higher, will be ample to keep out the neds and burglars, and give a home to all kinds of birds and invertebrates.
|copyright Robin Stott http://www.geograph.org.uk/profile/34609|