"compo" wrote in message
...
How does one tell when sweetcorn cobs are ripe and ready for
picking, please?

Technically, when the seeds have become bone hard.

Culinarily speaking, they are edible from almost the moment they are
formed, so you may simply wait until the seeds have developed enough
for your taste. With care, you can feel their size through the husk,
if that is the word I want.

Franz