@repentantslide: I keep broccoli under tall hoop-covered insect netting now. I had so much trouble with the little white butterflies laying the next generation on them, but after covering I have great crops. I watch the butterflies from my deck going up and down the net looking for an opening, and if there is a tear they will find it! So I keep BT on hand just in case. It also helps to keep the birds from eating all of the lettuce that I interplant with Broccoli. This last summer at the community garden I grew chamomile around the broccoli without a cover and it seemed to help too.
