I need to do that too. I won't be planting my marigolds so close to the peppers next year.
I made notes for next year's garden, so hopefully it will be better!
Today, I did clear some space for a fall planting. I hated to have to kill even just the 4-ish marigolds because they are just the happiest! I didn't have to kill as many as I thought I would because my cucumber plants are gone, and some pruning really opened up more empty spaces where other plants had died (I'm looking at you, Zucchini). I did pull my yellow-fleshed watermelons because they had no fruits or flowers, and I wanted to plant some (old) squash seeds that should have time to produce.
I have never done a fall garden before. It always stressed me out, knowing I'd have to kill some plants to make room for new seeds/seedlings, and trying to schedule it out and figure out which ones will be done producing when and how early to plant the new stuff.... I haven't done succession planting, either. It is kind of difficult to do when you have a little garden. The rabbits didn't touch my garden this year, so I assume I could get away with less marigolds next year. They really stayed in the middle of the yard (for the clover and maybe birdseed?). The neighborhood cats seemed to stay out, too.
So, to summarize, I planted carrots, peas, beets, radishes, squash, spinach, a loos-leafed cabbage, and Chinese kale. All should have enough time to produce before frost (unless it decides to be early). The Brussel sprouts will be a fall crop, too.
Golly, I had a lot to say, but I don't really have people I can geek out about plants with!
A picture to make this more interesting:
A Gaillardia finally opened all the way (planted from seed this spring, and apparently, they aren't supposed to flower until their second year?), and I am in love! I want a field of them to walk through!