The leaves from the squash plants in our garden are huge this year! The kids and I decided to try and make some leaf stepping stones from them. We probably attempted to peel the leaf off too early because the concrete wasn't quite dry. But so far, they turned out pretty cute.
The whole process was quite easy. We placed a plastic tarp beneath our work space and then mixed up concrete mix (just added water until we got a paste-like consistency) in a large bucket. We placed our large leaves flat on the tarp and sprayed the backside with vegetable oil so they wouldn't stick to the hardened concrete. Then we just scooped up the mix and placed it on top of the leaf (backside with the most veins). We tried one smaller leaf and it was pretty thin so that busted into pieces. It helps if the mixture is piled on thick.
We let them dry over night and then peeled the leaf off. I'm going to let them sit for a few more days to make sure they are completely dry and then we will spray off the remaining leaf remnants with a water hose.
Now that we know how simple the process is, next time we may try adding some paint to our mixture or even painting them once they are dry.