Pests Ahoy!

One of the (few) real benefits of high-rise urban gardening is the lack of pests. Many gardeners I've spoken with recently have all bemoaned the rate at which snails, slugs and various garden pests are converging on crops and causing a nuisance of themselves.Luckily, living away from the ground in urban London means that the only pests I have to deal with on the balcony are horses – as in