I saw a Monarch flying a search pattern over my rather mature milkweed in my back yard today. (7/24 about noon, 84 degrees). As I went outside, it flew over my house. Hopefully it saw some of the younger plants in front and oviposted. I will check there for eggs tomorrow. None were seen in back, though I found a couple new chew marks on smaller plants. No larvae found.
Nan Burke
Westborough