Howdy eugoss, I can not tell for certain. Can you post a color corrected photo,so that the condition of the plant will be easier to see? It looks like some tip burn, but it could be related to water (too much or too little) or to pH issues. Some more details about the grow set up, nutrients, would help others to help You. Also I grow in a DWC set up and I'm not up on soil grows.
Good luck with You grow.