Thames Valley Police received a tip off about drugs in woodland near Oxford last week.
Police left a note.
“Ooops! Sorry we missed each other, but feel free to call me on 101 so we can discuss a deal. Lots of love, TVP xx.”
They posted a picture of the note on Twitter and added a hashtag, “We’veGotManners”.
The cannabis plantation was found between a motorway and Wolvercote Mill Stream.
Police said the drugs were “seized and destroyed”.