I have enjoyed reading all the posts on host plants. It has given me info for my garden. However, I have been wondering what you are going to do with all this information. It sounds like you are going to use it personally to create a BF habitat in your yard. On keeping trees small for BFs, I like to think of it as BF Bonsai. I love the look of the Tulip Poplar tree. It's a very nice large tree, so I wouldn't mind having one in my yard, which is close to an acre. If Hubby would agree, our yard would border on being wooded! But, he likes everything spaced out. Currently my tulip trees are in pots on the patio, as they are still very small. Amazingly, though, I had small cats on the first tree within weeks after I got it. If you are looking for a small tree to attract a great number of BFs, the wafer ash fits the bill. I don't know if it is hardy in your area, but it's definitely one I'm adding to my backyard. As for Wild Black Cherry, there is one behind me that is an absolutely ugly tree. WBC is definitely one of those trees that would need to be kept pruned and not allowed to go wild. Having said all that, I'd be very sad to see the tree cut down, as it attracts all sorts of BFs and birds. Looks aren't everything! I think most of us on the forum have learned what works by trial and error. I know I have. I've been BF gardening for at least 12 years, and have given up on lots of plants, and am still acquiring other plants. Each season, I add new BFs to my raised category. My Xerces Society Butterfly Gardening Book has been a constant source for plants for BFs. Before I had this forum or used the internet, I relied on that book to build my garden. According to XSBFG, tulip poplar, sweet-bay, wild black cherry, chokecherry, ashes, hop tree (wafer ash), American hornbeam, spicebush, lilac, birches and aspens are hosts. The last two are listed for the Papilio canadensis. One thing I enjoyed about reading the XSBFG book is the accounts of the gardeners and their experiences. The notion that one plant works in all situations is quickly dispelled in this book. The best way to find out the best host in your area is to start planting. Start with the one you really want and if it doesn't work, try another. OKSandy

Are you aware that you cannot send insects (eggs, larvae, adults) across state lines without a USDA permit?

Honey tangerine seeds from the market should grow. They may be marked Murcott. Wild trifoliate is another but it is thorny.

Hi natal, I called Clegg's, they told me that their citrus trees are treated with systemic inseciticides and pesticides, I actually purchased a navel tree from LA Nursery, they told me it had not been treated with anything, but the two caterpillars that ate leaves from that tree got VERY sick less than an hour later, and they both ended up dying. From what I have learned on this forum, the tree was probably treated before arriving at LA nursery, not at LA nursery, and the nursery worker that I spoke with was probably unaware that there was a systemic insecticide in the soil. I went to Whole FOods saturday, they had plenty of herbs, but no rue. I had not thought about trying Harb's or Naylors, do they sell organic herbs? I will call and check with them tomorrow. Thanks