Hi - I am relatively new to raising Black swallowtail. I had found one here and there in my carrots patch over the last few years. This year, I got into raising monarch and have released about 50 of them. I am trying to raised swallowtail. I found some on dill that I purchased from grocery store and placed on my deck and also on a queen ann lace that I purposely let grow.

Couple of questions I have,

In ohio, when do swallowtail stop lying eggs and also 3 of the caterpillars I got seems to have gotten posion. They were eating organic dill that I got from the store. They were doing fine till I started feeding them this dill and they started throwing up. Any ideas. I did rinsed the dill well before feeding them.