What will a day of COMPLETELY DRY SoIL Do To my plants?

What does not kill us makes us stronger.

I normally let mine dry out at least once to see how long I can go before I HAVE to water.

When I was younger I wuold do it with my car too, run it till it is out of gas to see how far i could go when the fuel light came on. In a 1976 Honda Accord, 34 miles.

yeah mine dry out real good before i water i think your good

AWESOME i was worried, they look healthy but i thought dry roots cant be good, like is it dead once it dries or idk didnt really understand all that

how hot are is the ambient air? also, are they under a lot of light and grow fast?
and does the soil have perlite?
the plant may wilt when its dry, but if it stays dry for too long it will wilt and probably start dying.
i had my plant without water for almost 2 whole days under hid light and it nearly killed it. it came back right after i watered it. i also have non soil mixture so it doesn't retain water as much, if any like soil. but your plant should be fine just don't let it dry too much too often...also
the plant transpires most of its water uptake through its leaves making it really humid around. humidity should be in the 60s.
when the pot drys out, the humidity will drop and the plants will suffer.

assuming they were "sort of" dry before they were "completely" dry, i'd reccomend not doing that anymore. but they will be fine. i can't tell you how many times i used to do that when i grew on sills in a vacant apartment. they come back, but they really take a hit if you make a habit of it.

I've read that it's actually a good thing to allow the soil to dry like that every now and then because it causes the roots to grow by "searching for the water". But I've also read on here that "cycling thru wet and dry cycles is not beneficial to the plant" (I think Uncle Ben wrote that) so to each his own I guess. But bottom line is the plant should be fine as long as it isn't continued to be stressed.

they are growing very fast, but this is the second time this has happened; theres litterally no sign of discoloration or anything loook really healthy just droopy because of the underwatering
its so dry here the humidity is at 20%!?.. i tried a humidifier i tried a big pan filled with water to no success, my fan for my light just sucks to much air out of the room that the humidity suffers LOTS