The H/V curve is for take off and NOT landing.
I'm sure someone will correct me if I'm wrong, But I do not believe the H/V curve only applies at take off.
It would also apply for example, when ever the aircraft is within the shaded areas, right? which can include low flying (for example hovering at 150 feet). You would not, for example approach vertically from 500 feet with zero airspeed, because if you did, you would be within the shaded areas. Therefore the shaded areas of the H/V curve are to be avoided, including whilst landing.