What stage in flower do we start to worry about humidity?

Wondering if I should worry about humidity of 73% during week 3 of flower I have a aircon with the dehumidifier setting, might just buy one a small one off eBay... what are the ideal conditions for the coming weeks? Here is this morning I’m only asking coz I don’t want to get any mould in my babies

Humidity should be around 40-50% for the start of flowering and the last few weeks between 30-40%. If it’s a little high, then air movement will help.

Thanks mate I have my hygrometer at the top of the tent there is air moving over tops so possibly different humidity levels high and low? I’ll move the meter closer to plants ... got a co2 bag in there should I take it out do I need it in there at this stage?

I don’t use any co2. So someone else should answer that one. The humidity in my tent is between 50 and 60, and I have a fan going for air movement. Plants in there are between 5 to 7 weeks of flowering. Been cloning my Jack Herer and flowering in organic soil under 6500 and 2700 T5 HO’s. Last plant was only about 16” tall but I got 47 grams from her. Buds are just as big as my outside grows. People say you can’t get big buds from T5’s. I do!!!

Running co2 you can handle higher temps not sure about higher humidity ,as long as it's not hitting 80/90 and staying there. Try feeding less water.

thanks mate got my humidity down to 50% 55%... think I’ll avoid any dramas now I won’t stop worrying til I chop em but haha thats last night... day 23

I normally start to worry about my humidity when buds start rotting...
When I've done outdoor grows(Smoky Mountains) high humidity seems to bother strains that grow big dense colas. I don't have any a/c in my indoor space and sometimes will see 60+% RH. I just try and compensate with good airflow. So far it works.

I try to stay below 60 Rh at all times in my flower room.