Cosmos has finally all died off- from hard frosts this week. It was nice while it lasted.
Interestingly, I noticed that the leaf shape is different on the yellow-flowering cosmos and the pink ones. I sorted them by leaf shape when they were seedlings, just because I thought the plants with fuller leaves would look nicer on my deck. I planted all the ferny-looking ones with deeper notched lobes in the back bed. All the ones on the deck flowered orange and yellow, the ones in the back flowered pink.
So now I know if I grow from a mixed packet again, I can sort the seedlings by flower color from the leaf shape.