I have a recently transplanted 7ft saguaro (3 weeks in the ground). No water except for day of transplant and one day of rain. It was oriented correctly upon transplant. I noticed starting on day 3 and ever since that tt has yellow blotchy areas on the Southwest side of it. Not sure what is going on with it. Some days it looks better than others. Some days it seems like it is getting worse. See attached photos. Any help deciphering what is happening would be appreciated.