I have been taking your advice about leaving roots in situ, partly for the reasons you have given, but also to avoid putting any soil on my compost heap. I have some problem areas with onion white rot and don’t want to spread the soil-borne fungus into the heap and then, via the compost, to other areas of my plot. Does this seem a good idea or I am being paranoid?
Best wishes, John
PS I posted this in a runner bean thread so perhaps it better to start a thread in diseases.
Thank you for the quick response, you normally have to wait 15-18 years for onion white rot! My compost heaps don’t tend to get hot so I’ll keep to your advice about leaving roots in the ground as there are so many good reasons to do that anyway.