Well, 1st four weeks have produced lots of nice looking cones! More than I expected for a 1st year plant.
Thanks for the info Suthrncomfrt1884! Because of my schedule, I'm going to go out the last weekend in August... 3 weeks from now.
Between the cascade, centennial, willamette & nugget plants, some may be a tad over-ripe, but I hope there will be lots of good ones to harvest. I'll learn some on this season, and next year, I'll try to be a bit more accurate on my timing.