Back in the day, I would grow dozens of broccoli plants and put up 30 gallons of frozen broccoli each year. That hasn't happened for a very long time.
Earlier this spring when I was so gung-ho about the garden and how great it was going to be, I planted quite a few cole crops. Let me tell you, the broccoli and kohrabi showed out. The broccoli heads were larger than my own head and the kohrabi were as large as soccer balls. Amazing what a little bit of chicken shit will do! (Handsome had to come on his lunch break and cut the roots off the kohlrabi as I wasn't strong enough!)
It took 7 hours to chop, blanch, and package all this bounty. I ended up with 7 gallons of broccoli florets and 6 quart of kohlrabi.
To process both crops: Purchase some bags of ice. Set a very large pot of water to boil. (I used my water bath canner.) Fill your kitchen sink with cold water and lots of ice. Cut up your veggies as desired ahead of time. (I cut the florets into large forkful sizes and the kohlrabi into 1 inch cubes.) Add a layer of veggies to the boiling pot, replace the lid and set the timer for 1 minute. Once the timer goes off, use a large strainer and dip out the veggies. Immediately add them to a sink full of ice water to stop the cooking. Leave in there for a few minutes. Place onto cookie sheets to finish cooling. Repeat the blanching process until all the veggies have been worked through. Package as desired and freeze.