Harvest plant in sections

What’s good fellow growers!

I hope everyone is having a great grow!!!💪🏽💪🏽💯💯

I think I have to harvest my plant in sections. This is my first grow and one of my plants doesn’t not have an even canopy.

How would I go about flushing my plant if I am not going to harvest the entire plant?

please let me know 💪🏽💯