Does anyone double crop their flower growing space?

I am fall sowing larkspur, godetia, agrostemma, and sweet peas. I have lots of foxgloves in and aquilegia.

I am wondering if it would be worth ripping a lot of this stuff out next year after the main bloom time (end of June-mid July here for much of the above) to replace with zinnia and aster seedlings and then in the early fall plant out seedlings of the foxglove and aquilegia again.

I envision leaving the best flowers for seed saving.

I have limited space and want to maximise my growing opportunities.

Also, has anyone intercropped flowers for the mid season blooms? I though that might be easier that transplanting them? I am not sure which would work better.

Any suggestions are welcome. I will try both but would love to hear from people with experience.