I had some grading work done in my backyard about a month ago. The grading work tore up my backyard. Yesterday, I just had my landscaper replace the damaged area with sod. My existing grass is much greener than the sod that was just laid. I think it's 'cause my chemical guy came out a few weeks ago and treated the old portion and put some iron on it. I know it will eventually blend, but is there anything I could do now to make it look more consistent? Should I put iron on the new sod or will that damage it? Thanks in advance for your advice.