QuestionsHow to growVegetable GrowingSite and SoilNettle liquid feed 0 Vote Up Vote Down Carmel Quirke asked 15 years ago I have made liquid feed from nettles, how long will it stay good for in plastic milk containers? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago It is usually used in a few weeks. It would not lose its nutrient value beyond that, but boosters such as amino acids might degrade.