My DH grows broccoli and it can get worms in it. Last year, there were hundreds in what he brought in for me. But, if you cut it into small pieces and soak it in salt water, it will kill them and they float. I had to soak it several times to get them out. They hide in the florets. After soaking, I blanched it and even found one floating in the pot! Then I froze the broccoli to use later.