Flushing ready plants with younger plants in same flood table.

OK, piss poor planning has me asking this.
I am growing some freebie seeds I had and some are sativa (Thai) and some are Indica (The Pure).
The Indicas will be ready to start flushing in 3-4 weeks while the sativas will still have a long way to go.
Do I just flush, starving the sativas and then nute them back up when the indicas are gone?
I didn't know some were sativas but the wife wants to try them as indicas help her pain but knocks her on her ass. It's a ugly lst project as those sativas want to get big and I keep bending them down and spread to maximize the light.

No easy answer, compromise both plants, or hand flush the ready ones somehow. I learned the hard way also, il never run diff strains in the same system again, even sw strain from seeds can have Different finish times, I now only use clones of one strain. Hand flush those suckas

Thanks for the input. I have some 5 gal buckets ported for an Ebb and Grow system I have been building. I got the control bucket built but have not had the time to leak proof and test. I might use the buckets with some perlite hempy bucket style and hand flush them like you suggested. One of the few times having 5 gal buckets with a hole in them will pay off
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