I was sticking to a watering regimen of once a week for my semp bed last year and found that my semps didn't look
as good as I thought they should. So this year I started to water twice a week especially on those hot days of 90 degree temps which can affect my semp bed when the full sun hit it from 11am to 4pm. I also put a shade cloth or frost cloth (which ever is the biggest sheet available in the stack) over them during the full sun exposure. Both changes have helped. When it cools down from those high temps, I water only once a week.
Btw, Ofm, those hens sure are prolific. I thought my hen with 25 offsets was impressive. Your two hens each are forming a colony...