(((Hvert))) I almost think the only thing to do at this point is to take a step back and laugh. Because your mom is... you know... kind of crazy!

If you want to throw some crazy back at her... you could go to her office, but insist that YOU drive... tell her that since she's getting older, you're concerned that her cognitive faculties may be diminishing - but say it in a truly worried, concerned voice Then, ask if she *remembers* where she got the gardening supplies, as if there's a good chance that she won't!

Sorry - mom stuff brings out my slightly evil side! Good luck with whatever you decide to do here!