Hi! I took this leaf off a succulent and left it on the soil with the idea to propagate it from the leaf and then forgot about it. About a month later, this is what it looks like. It has grown roots, but no mini-plant. Is there something I should be doing for it to grow a plant? It was also kept in the dark and I had forgotten to water it, so perhaps that's why there is no plant. I have now put it in the sun and sprayed it with a little water. Any ideas? Thank you!