Hi guys My city suffer with dry season, the daily...

you irrigate the same way as always. get entire thing wet, wait for top layer to dry, repeat. it'll just be a bit more frequent if your VPD is high due to increased transpiration which increases rate of roots taking in water. If it wilts at all, irrigate slightly sooner. Also if soilless you get 10% runoff, religiously. with soil a little runoff ensures you got the whole pot wet. if not doing it like this you have been doing it wrong. Not trying to be mean, but doing it right avoids a ton of potential problems. nobody can give you a specific answer. it simply results from what constitutes your substrate and temp/rh conditions. Also, if you do it like the above, it doesn't matter one bit how the environment changes... you simply react to the top layer starting to dry. nothing else matters.