Hello! I am sorry to see this. This looks really sad.

I have a question. And if you do not know answer, maybe you know somebody who would know. I am trying to raise moringa trees. I live in western Balkans in Europe. I started to raise the plants from moringa seeds. They were OK during summer. But I made a mistake and left my plants on cold below zero and they started to die. Now I moved them into my room where is warm and I gave them lots of water. But they are still yellowish and completely dry. Is there anything I can do to save them?