I remember the story from a couple years ago in the press.
At Oxford? , the old great hall/church needed the main beam replaced.
They looked for a 200 ft long beam everywhere, and had architects draw up
plans for a metal replacement.
the old groundskeeper finally asked what was up with all the specialist types running around, and they told him about the dilemma they were trying to solve.
the groundskeeper drew himself up, and took the group outside.
there he pointed to a great oak growing beside the cathedral, and told the suits,
"thats why the groundskeepers planted that oak 150 years ago".
they had left instructions to prune it for a replacement beam.
now THAT is planning ahead