The monarch larvae have stripped this plant of all but a few flowers and a couple of seed pods. The aphids have moved in. I’d never seen aphids in any other color but green until I started growing butterfly weed. Normally I just wipe the aphids off using my gloved hands, but I could see that there are a couple of aphid predators on this plant so I left it alone. I’m going to cut the stem back later. Between now and then I’ll keep an eye on this group of aphids and if it gets too big I’ll manually reduce it.