You could make the mould out of timber. I made a few things out of concrete using timber as the mould or inserts. Depending on how smooth the timber is and how you have created the mould, sometimes you don't even a release agent.
Welcome to Workshop and thanks for joining in the discussion. I trust you will find lots of inspiration and helpful information from our community members on the site.
Can you please clarify your question for us? I'm sorry but I wasn't sure which pots you were referring to.
living in Sydney here actual gardening space comes at a premium, yet having seen this ingenious idea with the milk bottles, I would assume that one could make deep concrete planters to replace those white grubby brocoli boxes to plant fruit and veges in?
I know one could actually make them from treated timber which can be a bit expensive and also flat back planters may be purchased also but this appears to be rather a more duarble and cheaper alternative?
Welcome to Workshop Edward (@TradyEd48). It's great to have you join us. I'm looking forward to reading more about your projects and plans. I'm sure you'll receive plenty of inspiration and helpful advice from our community members along the way.
There's plenty of space-saving vertical garden products available at Bunnings, and Workshop members have shared planters in all shapes and sizes. Here's a few ideas to get you started:
You might like to start a new discussion with some pictures of your space once you have a firmer idea of what you'd like to build. I'm sure our members would be more than happy to help.
I think the problem you will have with large concrete planters @TradyEd48 is their weight. What kind of an area do you have? A patio or balcony?
Your concrete vases have been incredibly popular on Workshop. Thanks again for sharing the project and including step-by-step instructions. Your project has now had over 12,000 views and today we're featuring it on Instagram.
Hope to see more great projects from you soon. Let us know if you need a hand with anything.