Waterhemp is a new weed to North Carolina. It looks a lot like the other pigweeds- redroot pigweed and Palmer amaranth. Waterhemp often already has herbicide resistance.
This short video will give you some pointers in identifying tall waterhemp so you can achieve the weed control you desire.
For more videos on identifying waterhemp look-alikes, see the resources below.
Identifying Palmer Pigweed:
Identifying Redroot Pigweed: