You can se by the 1st of April we are just getting started, normally just 3-5% or 5-6% planted by April.
Planting is relatively slow into the third week and then we really start to see the planting pick up as we move in to the last 10 days of April and first 10 days of May. That is when we plant about half the US corn crop.
USDA typically starts reporting plant progress for corn once it gets to 3-5% complete, we will see if they report today on planting progress or wait until next week.