This is a great idea brought to me this fine spring (dare I say it?) morning by one of my favorite websites Green Renaissance! I love the idea of recycling old sweaters this way. Every year I spend a fortune on planters and these are so cute! They didn't say anything about how to make them so I am going to assume by the picture that a sewing machine (or at the very least one of those handheld ones) would be useful in this process as well as strong wire for hanging. The other thing that I am sure would be needed is wax coated thread as regular thread would wear down pretty quickly. These are so cute and purposeful that I don't think that it would matter to anyone if they were only useful for one season, but I am sure that if you wanted to you could line them. I'm so excited...I can't wait to fill these with my herbs so stay tuned for the results!