Hi I had a new lawn put in three weeks ago. I had the guy use Pennington Sun and Shade. I have watered it as instructed and had new grass grow in six days, It's been hot and humid so I watered it three times a day to keep it moist. Now the thin grass is about 3.5 to 4 inches tall and also now I am getting new thicker blades coming up. I'm confused as to the new thicker blades and not sure if I need to keep watering twice a day and also when to cut it the first time. I am afraid to rip up the thin stuff and walk on it. I just don't know what to do at this point.