Hydroponic experiment. I regrew some store bought kale over the course of a mere month. A good tip is to change the water it's sitting in every other day until roots appear, I waited 5 days on a previous attempt and it started to smell similar to Surströmming. The liquid I'm pouring in at day 4 is nutrient water. Nutrients: Masterblend tomato 4-18-38, calcinit and epsom salt. Lights: HLG 65 quantum board.