Once you've dried your seeds, put them away until the next year. Because pumpkin seeds will take 90 to 120 days to grow a fully mature pumpkin, the best time to plant them is in late spring, ideally ...
It sometimes self-seeds, so you may end up with butterfly weed plants every year. Like all milkweeds ... Watering your flowers one to two times a week should be enough once they’re well-established.