Looks a little bit like Iowa doesn't it!  We put down white plastic to start our later crops...  it keeps the ground cooler by reflecting the heat.  Keeping the plants cooler is a big deal this year because we have had days of 106 heat and above.

Your looking at watermelons along side the sweetcorn

Planted pumpkins in with the corn and they have vined out in a big way

Here is another garden that was planted 2 weeks ago