Started with 4 Cascade. Two at each of the end posts in the pic. Each year I will trim off some stray growth to start a plant in between. Now there are 2 rows, each with several plants.
First year I got a couple ounces. More in later years. I had around 3 pounds in 2017. Only a little more than a pound and 1/2 in 2018. Some years I pay more attention to the initial sprouts and selecting bines. Other years I just let them go and only cut back later growth.
Year 3 for a plant is usually their best. I'll spend some time during growing season training them on various configurations of string every few days. I want to create a taller more confined structure for them. Right now I just run some strings and rope to give them something to grow on and for ease in picking.
Usually pick 2 or 3 times before the season is over. Weigh and vacuum pack in 1 ounce packs to freeze.