Corn growing stage: V6 – V8

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source: https://www.pioneer.com/us/agronomy/staging_corn_growth.html

The growing point and the tassel go above the soil surface around the V6 stage.

(source: https://www.lsuagcenter.com/profiles/lblack/articles/page1586959823858) and modified by agronomy4future.

The number of kernel rows is being determined from V7 to V8.

The stalk begins to elongate.

(source: agronomy4future.com)
(source: agronomy4future.com)

Also, you can see the corn tassel.

(source: agronomy4future.com)