Hi, maybe the best way is just to contact some injection molder. They probably will be able to help you to adjust the design so you can actually produce the thing and they will help you to choose the material, do a prototype, fix the issues in performance etc. You have mentioned that you have some gardening project, does mean that you are looking for some biodegradable eco-friendly materials? If yes, check this case study https://polymermedics.com/blog/cases/how-we...adable-catheter, I believe the same guys will be able to help with a project itself, good luck!