The author's wife, Sigrid, finds broccoli a good vegetable for freezing. But you'll need to spray broccoli with DDT after each harvest to prevent cabbage looper infestation of the next crop of sprouts.
"Garden for Your Freezer,"
Iowa Farm Science: Vol. 5
, Article 3.
Available at: https://lib.dr.iastate.edu/farmscience/vol5/iss7/3