Edible or Ornamental?

"Once more your potatoes are crowding out my clementis."

"Aye, but I didn't know they were growing there. And you've another one of those plants there."

I know, I know. I've already handed in my form for a council allotment. But when I get it,  I don't want to grow anything on it. Instead,I want to cover every inch  with a huge, all-mod-cons-including-wide-screen-HD-telly-and-uber-sound, taking-the-piss-a-bit, shed.