If you spend a lot of time wandering the British countryside as I do, you become familiar with the crops grown by the farmers. Wheat, barley and oilseed rape(canola) are ubiquitous, beans, peas, spuds and maize are not unusual and the occasional crop of linseed or clover is not unknown. The agricultural equivalent of a trainspotter, me.
Yesterday brought a new one for me though, a crop grown for industrial fibre that isn't often grown on that kind of scale on these shores. Hemp, though not in its "medicinal" form. Last time I saw leaves like that I was a student, and they were being grown in a pot(no pun intended) on a friend's windowsill. Not very illicit, but then again I think they were mostly for show.