We had a hedge to line the canal but I thought some fencing would be nice for the railway track. I did some sniffing around online and although the MDF offerings were inexpensive they lacked the detail I was looking for. I settled on Rubicon Models plastic Picket Fence Set 1 (it also comes with a couple of street signs which I don't have a use for yet).
It come with 4 sprues with 4 sections of fence, a gate and a sign post on each . I would only need two of these sprues for my 3' by 3' Pulp board.
You could easy just prime and drybrush these as they have very nice but subtle wood grain texture , but I wanted a white washed fence that looked like it was in need of a touch up. I thought it would look nice on a green backdrop.