Today, I found a marrow in my black box (glass and tin recycling bin). Walking my nan's dog with her, we saw that a marrow had been left on an upturned bucket at the end of someone else's garden. Are there more?
Well timed! I've just had a phone call from a friend who's desperate to offload the glut of marrows she's harvesting on her son's allotment. Thanks for the suggestion, Kris!