The end product of composting with worms is vermicast a.k.a. worm castings or vermicompost. http://www.naturesperfectplantfood.com/2012/05/07/vermicast-the-why-and-the-how/ They are a fabulous organic fertilizer and the perfect material to use for soil amendment. http://www.naturesperfectplantfood.com/2012/07/10/building-soil/ Vermicast is considered safe for certified organic farms. If you vermicompost at home you will have a small supply of castings to use for your plants but larger projects may require the purchase of vermicompost. http://www.naturesperfectplantfood.com/2012/03/10/know-your-vermicast/ when that time arrives please include us in your plans.