In article , nambucca
writes


Well rotted compost is best for mulching

Research in Australia found that Coco Bark and other non rotted mulches etc
pour resins into the soil making it impervious to water

If the material has decomposed during normal composting then theres no
damage to the soil



I would be curious to know, given the difference in climate, whether
this research has any relevance to the UK

--
Kay
"Do not insult the crocodile until you have crossed the river"