As the organic food movement has picked up speed over the last few years, there is also a movement with organic, biodynamic and natural wine. Organic & biodynamic happen in the grape growing process, for them to be natural the process must continue in the wine making process. By not using or using the least amount possible any of the 200 approved additives permitted in wine, this also includes the technological manipulation(spinning cones, laboratory cultivated yeast,etc) that will take away what the individual terror & what mother nature has provided. This is the way wine has been made for centuries before technology was introduced.
The definition is similar to the German Law of Purity for beer, where only water, barley and hops are used. Natural wine is just grape juice and nothing else.
Some aspects to consider in natural wine...
Avoiding chemical herbicides.
Using indigenous yeasts.
Hand picked grapes.
Low to no filtering & sulfites.
No adding of powdered tannins.
Respecting of the grapes including rough handling,pumping or micro-oxygenation.
Natural winemaking represents the true expression of terroir and prevents wine varietals from all tasting the same.