@jthingelstad Your picture needs some knees in it, so we can tell whether the corn is right on schedule or not. 😊
I grew up in the best corn belt in America and your rule of thumb is totally accurate.
@Ron yeah I missed the point of reference. The crazy thing it is probably 6-7 feet high. This “modern” corn seems to follow completely different rules.
@jthingelstad Yes, they have developed a lot of wonderful new strains since that rule of thumb was created! After I learned the rule, I started checking and crops have always been way ahead of the old rule.