Suggestions for Host Plants for Western Tiger Swallowtails
I am looking into small trees or shrubs that I can add to a small yard to attract the WTSs in the area. I have had success with willows in the past but I have to remove the willows now because they have sent roots from the pots into the ground and are too close to my house and my neighbor's house. I will continue to keep some in large pots that are the large shrub/small tree types but the big guys are getting out of control. I have ordered the Wafer Ash(hop tree) but that is for the two tailed swallowtail and I don't know if the WTS will use that. Does anyone have experience with the tigers on prunus or birch, though it would have to be a small birch? Any help would be greatly appreciated.