stage 3 ; Growing point differentiation
About 30 days after sorghum emerges, its
growing point changer from vegetative (leaf producing) to reproductive (head producing).
The total number of leaves has been determined and potential head size will soon be determined.
About one-third of the total leaf area has fully developed-7 to 10 leaves depending on maturity class and the lower 1 to 3 leaves may have been lost.