In message , Janet
Baraclough.. writes
You can grow comfrey to bulk up your manure heap and activate it;
Bocking 14 is a giant variety that stays where you plant it and neither
seeds nor spreads by runners.

I've printed out your post to show my HDRA-sourced Bocking 14. Hopefully
it will then get the message that despatching scout plants is an
unacceptable way to behave. ;=)

(It doesn't do it very much though, and it has been there a long time so
it's probably getting bored of the view.)

--
dave @ stejonda