That’s exactly what I’ve been doing for a week and it seems to be working well.
I created 3 separate Fixed schedules with all my zones on it (because I did a LOT of re-seeding this spring) and I have each zone run for 3min in each of those schedules.
I left my Flex Daily schedule alone with all zones included. And it’s tracking everything with the excess water. All my zones are around 90-110% full, so it’s been skipping the regular Flex Daily watering schedule.
All three of my “seeding” schedules will auto-expire after May 31, then it’ll all go back to normal on Flex Daily.
So far so good! Though I fear what my next water bill will be to grow all this new grass.