(Looks like a lot of work, but I love the end result) In a bucket or pail, mix two cups of cement with 1 cup of water to create a thick paste. spread the cement mixture onto each leaf. Allow the cement to dry then Flip the mold over, and remove each leaf.
DIY Concrete Leaf Bird Bath DIY Concrete Leaf Bird Bath - love this idea! Those leaves look like rhubarb leaves to me.. Hmmm may have to do something like this.. Especially if I do a cob house some day, this would be a great wall feature/shelf.