Anyhoo, writing about Back to the Future in a gardening blog did give me a bit of a challenge as there is not a lot of gardening in any of the films. Then I remembered the pine tree(s). In the first film Marty sets off from the Twin Pines Mall car park. He returns to the Lone Pine Mall car park. When Marty arrives in the past he has to escape a farmer and in doing so he runs over one of the baby twin pines killing it and thus changing the landscape of the future.
Please note, I had a notion that I would finish this by writing something about the Terminator series and the various dates and years referred to in that franchise. I was defeated in this objective as after looking at the films I thought I knew well I just got completely lost at plot twists and re-written timelines and gave up. I just hold on to the thought of time travel as being timey-wimey and leave it as that.
It remains a good pine tree.