Trick to Make Your Green Onions Grow Like Crazy! Want your green onions to grow thick and strong all year round? Follow this simple recipe to give them the nutrients they need for explosive growth! 1 Mix the Ingredients In a container, combine 1 liter of water, 1 tablespoon of coffee grounds, 1 tablespoon of crushed eggshells, 1 tablespoon of sugar, and 1 teaspoon of yeast. 2 Let it Rest Allow the mixture to sit for 24 hours so all the ingredients can release their nutrients. 3 Strain the Mixture After 24 hours, strain the solution to remove any solid particles, leaving only the nourishing liquid. 4 Water Regularly Use the filtered liquid to water your green onions once a week. The Result: By regularly feeding your green onions with this mixture, theyll grow stronger, thicker, and faster! Good luck with your green onions!