Long Overdue (Young Ho Yoon)

Since my low comprehension, picking up the significant point in the article was hard through reading. But I think, Nye wants to tell us, in any case, if we miss the time to do something that we have planned before, we will be faced with some matter surely. In other words, the saying long overdue is used as figurative meaning when the work had to be begun already a long time ago, but it’s still not on performance. Therefore, maybe in the last paragraph of article, the gardener mentioned like that figuratively.
Throughout such as Nye’s article, I think some expressions like ‘Don’t give yourself the go-ahead for the next level if there are things that are long overdue’, ‘Going back to basics was long overdue’, ‘The bottom line is that a new brand strategy is long overdue’, ‘We should take long overdue steps to get our business back on the right track’, and 'We can’t take advantage of a new opportunity unless we take care of the long overdue homework first' are used today.