The best one has to be actually getting up and starting a garden thats the first thing on the list

Used baby nappies are a good source of nutrients and they swell when wet sort of like crystal rain. But i wouldnt use them for growing food or indoor pot plantz.

Collect seaweed then put it in a drum or bucket cover seaweed with water put a lid on it and leave ur mix to ferment for about 4 to 6 weeks. The juice left can be waterd down to use on the garden

Rain water is always better than tap water because the nutrients have not been tampered with and tap water usually has chemicles added for human consumption

Human urine and fecies are a deadly tail of nutrients if brewed properlyjuice or powder can be made to add to any garden and dont be scared to try it Viet cong made prisoners use there fecies for gardens to feed everyone in the camp