Doctor, doctor am I normal?

By Stephen:

Several of us are growing zucchini this year. And why not? They are easy to grow and rather more productive than other vegetables. My (Stephen’s) exuberant zucchini have developed some leaf blotches of late, as shown on the photo.

This is apparently nothing to worry about and just a normal part of the ageing process. The ageing of the zucchini plant, not the gardener!