GA, on your collards, if you give them a shake, do little white things fly out? I've had success spraying those (whiteflies) with diluted dish soap, as well as diluted neem oil if you have it.
My collards lived through the winter so they've already gone to flower and are huge, gnarly "vines" that are crawling out of their raised beds. Thankfully, some seed is growing and I also have normal plants to take over when I finally pull these behemoths. I'm happy to see contented honeybees enjoying the yellow blossoms so I'm not ditching them just yet.