Pam Moore wrote:
Potato fertiliser? I've never encountered it. Is it readily
available? What's the NPK?

If you are still having trouble finding it, I'll ask Nick (when he
re-appears) where ours comes from, as we seem to have a vast stock of it.
Which probably means we bought it up at the end of the potato season last
yar from somewhere.

(Drop me an email if I forget)