This is a shot of ear 38M58 taken on August 14 which is 34 days after this hybrid began to flower on July 10. It took about 5 days for pollination to occur after the first silks emerged, so this corn was done pollinating on July 15-16. You can see it is now in the dent stage of development.
After pollination, corn advances through 5 stages of 12 days each, or a total of 60 days, to reach physiological maturity.
1. Milky embryo or blister stage
2. Young sweet corn stage
3. Beginning dent stage
4. Half milk line stage
5. Hard dent stage