A diagnosis and assessment can help you fix the problem. A second pair of eyes may help. You will need to give it some extra attention at first. But once it's established, it can grow on its own. You should not have to worry if you used sharp and clean cutting tools and secured your plants together. This ensures your blades remain sterile and prevents you from spreading infection or diseases to other plants. Succulents can't survive in low light conditions and at low temperatures. In terms of light requirements, the Euphorbia polygona is similar to other succulents.