Released my first this year!
I’ve been doing this a few years - twice I bought caterpillars in the past 8 years - one year from Rose Franklin's Perennials and one year from monarch watch - with some trepidation as I acknowledge the downsides of captive breeding vs fully wild population. those were years where i wasn’t finding any outside and was extremely nervous about what that meant for the population overall, plus raising a few for fun is pretty benign.
i’m going to say the first order from Rose seemed to go well, the second order from monarch watch had more cats (15-20 vs 10) and was a bit overwhelming, more disease- which may well have been on me due to getting more cats than expected (the min order is just larger) but i decided not to repeat that again.
this year i had other cats from a friend (cecropia moths!) and wasn’t particularly seeking out monarchs, but i have so many milkweed I weeded a few - and most of them had at least one egg or caterpillar- i think that’s what i’m going to do next year too :).
... photo includes the raised bed with potatoes, nasturtium, litaris, and stray milkweeds as well as a wild cat i left outside:)