I planted dill this year because I also planted pickling cucumbers. My intent was to use the dill in the canning of my DILL pickles. Usually I would have been upset to see caterpillars covering my plant but not these caterpillars. I was delighted to see the swallowtail. I recognized them immediately, I did my little happy dance and grabbed the camera.
Once they finished off the dill they moved on. I’m not sure where they morphed into Butterflies. But the garden is now full of dancing butterflies.
Tried and true, from me to you.