Giorgio,
Good evening.
Knowing that you have beaches at Cagliari, do you use’ posidonia oceanica’, the Mediterranean marine grass/seaweed?
Is it available freely for collection?
I know it is used to create composts for basil growing, and salads.
You may find this link of interest:
http://www.compost.gr/biological-compost-posidonia
Please update us with your progress
REGARDS
Cleansweep
