My lawn is currently sodded with centipede. I recently cleaned some brush and I need to extend the sod to those areas. I am having a problem with drought. In my area we have sandy soil so regular seeding didn't work well. I have an irrigation system but it still seems like it's not getting enough water. I set the timer to run 15 minutes and my water bill is through the roof. I chose centipede because it should be drought resistent and less costly to manage. My question is, "Will I strew up my lawn if I overseed with Kentucky 31 Tall Fescue?" If not will I be okay with overseeding with a walk behind spreader or do I need to get a seed splitter?