This is the perfect grow bag support frame simply place the frame under your grow bag and then put your canes through the desired support ring and into the soil no tying required the support rings take any size cane and ensure they stay in place r the frame has fixed cane support rings suitable for either 2 3 or 4 canes it is made from strong plastic coated steel for a longer life and it can be used in conjunction with either a reusable grow bag salad bag or grow bag trays stable suppo