I just harvested for the 4th time on my Cascade bines about an ounce and there is what looks like 1 more small harvest left, probably 3-ish weeks out.
That will put me close to 20 ounces of hops this year, a personal best.
I'm in Texas, so the hops can break ground as early as President's day in February, or as late as week 1 of March. The other varieties a bit later. Typically the first harvest is about May time frame, then late June or early July, then early August. Nothing just comes in at the same time.
My prolific bines produce, then, the main bines produce offshoot bines, so I train those and let them run up the rope.
It's a chore, I have them on drip irrigation, I think now it's 20min. every 3 hours for the peak summer temps.
When I was in VA, I got one harvest and that's it. Here, they can grow well into November, but I've never seen production later than ... I think mid Sept. and that was a weak one.