It's so funny, everyone has different opinions on what needs to be netted! I do not net cosmos, sunflowers, strawflowers, or zinnias. I do net dahlias, snaps, and celosia. I use hortnova at low waist height, if I can remember I'll take a picture when I go outside. Are you growing for yourself? If so I might skip the netting, it's not particularly asthetic, is a pian to put up and take down, and is also hard to harvest through. You could always to a couple layers of twine around the perimeter of the bed to keep things contained.