If it were me, I would wait. I do recommending checking the plants for caterpillars every now and then.
If you want a fun project then order the caterpillars. It is really fun watching them happily munching the milkweed leaves. If you decide to order them, I would suggest having enough leaves to feed them.
Invasive plants are Earth's way of insisting we notice her medicines.
Everyone learns what works by learning what doesn't work.
After tasting what a great set of vegetables milkweed provides I decided I really wanted to grow them....then poof, they appeared in a bright section of my forest garden. You've got to love perennial vegetables that just blow on in with the winds :)
Besides having these tasty vegetables (spring shoots, flower buds, and pods) growing, and even planting themselves, with no help, the other stacking feature I was looking for was support for Monarch butterflies. I was walking by yesterday and noticed an adult Monarch hitting the flowers so I looked around and, yes!!!, their caterpillars are now also in my milkweed patch. Here are a couple of pics from this morning....aren't they beautiful!
Biochar maker/enthusiast whose mind wants to dance, but whose body is a really awkward white guy.
Pics of my Forest Garden
The mature caterpillars will go wandering when they are ready to form a chrysalis, so if you find large caterpillars on other things like that fig it is probably fine to let them keep searching for a perfect place to pupate. :)