The 5th true leaf of corn will always extend from the second stalk node above the soil line.By knowing this you can continue to count the total number of true leaves that any hybrid will produce.The first 3 leaves that were originally in the seed will have senesced by now and will not be found as they will have already begun to decompose .You may in some circumstances still detect the 4th true leaf as shown above extending from the first node above the soil line.Most 95 - 103 CRM hybrids will produce a total of 20 true leaves.Fuller season hybrids may produce 21 or more.