"is a rich, nutrient-dense living water that's fermented from sprouted grains or seeds. ...rejuvelac not only costs pennies on the dollar but ranks in superiority in terms of probiotic quality and quantity. ...It takes about five days to make and is suprisingly easy ...The seeds or grains must be raw or they will not sprout. ...You can use rejuvelac in place of any recipe calling for water. ...Rejuvelac is also a [DIY] starter used in fermented creams, yogurts and cheeses [to include those made from nuts and seeds]. Stir in some juice, honey, and ice cubes for a delicious beverage. ...soak ...seeds or grains ...covered in water for eight hours or overnight. Buckwheat or smaller seeds, can take as little as two hours. ...Drain off the water. Give the grains a good rinse... twice a day (or more)... cover the sprouts with a breathable cloth. ...out of direct sunlight. Tilt the jar... and let the water drain out. ...After the berries have sprouted, give them a final rinse and fill... with water... approximately 4 to 6 times more water than sprouts. ...Let it sit thirty-six to forty eight hours [covered with a breathable cloth]. Less time... if the weather is warm... more if... cool. ...A slightly sour and fizzy taste should be the result. (If it tastes like it's gone bad, discard... you can water the plants with it—and begin again.)"
January 1, 1970
https://en.wikiquote.org/wiki/Fermentation_in_food_processing