Crystal: here are some great ideas!
I have used an old ladder and placed wood on each ring. This makes a great plant display!
Here's an idea: https://www.youtube.com/watch?v=jvXbAujDNqI
A bookcase, baker's rack or even stacked crates works.
Scroll down to #3: http://hngideas.com/diy/diy-plant-stands/
here are some great ideas - https://www.charlestoncrafted.com/diy-plant-stands/
I saw many amazing inspirations for flower holders with the use of pallets. They are very cheap and you can transform them into many things. On my own I have also a sofa made from pallets. My dad is going to make a pot made of pallets. Many ideas!
here is a 3 tiered corner plant stand that we made! https://www.charlestoncrafted.com/diy-3-tiered-corner-plant-stand/