Can I flush soil when it has poor drainage?

I'm planning to flush the soil with fresh water.
I know how to do it, but the problem is that i notice water doesn't seem to drain from the soil properly. It just takes so long for water to drain.
So when i water my plant sometimes she looks droopy the amount of water i give her is never too much.
I think it's because i didn't mix enough pearl light.
Anyway, since i need to pour a large amount of water for flushing, which might cause insufficient oxygen in my case, i wonder if it will harm the plant.
So, is it still safe to flush the soil?
If not, any solution?

Why are you flushing and how old are plants. Picture would help a lot.

BarnBuster said:

Why are you flushing and how old are plants. Picture would help a lot.

Click to expand...

it's 6 weeks into flowering and there are some sings of nutrient burn, especially nitrogen.
Of course i stopped feeding her N, but still the problem remains.

You say nute burn as in yellow leaveS? thats what tends to happen as flowering progresses and its N deficiency just ride it our man. I would not worry about flushing it just water with straight h20 and a very small portion of fert every other water

You should still be able to flush. It doesn't sound like the drainage is poor as much as the medium holds onto the water.... would you say that it accurate? A pot can only hold so much water, so once it is saturated and you continue adding water, it will begin to flush. The worry is about root rot and stress from overwatering? I'd suggest flushing quickly and don't prolong the process. Here is my reasoning. Soda is bad for your teeth, but it would be better for them if you chugged a gallon of soda in a minute than if you sipped and gargled a can of soda all day long. Make any sense? Do the flush and then make efforts to aid in the drying process. Put the plant in a warm room with plenty of air movement, that is about all you can do to speed up the drying process.
Another thing I would suggest is to make a microbe/compost tea. Some people use this to prevent and possibly reduce root problems in hydro, so maybe if you finished your flush with an active aerobic tea it would be a slightly smaller chance that problems occur from excessive moisture around the root system.
Now I don't recommend this next bit because I've never done it and haven't done much research, but some people insist on adding hydrogen peroxide to the soil. They say it adds oxygen as the peroxide decomposes and it will kill off a lot of the anaerobic bacteria. DO YOUR OWN RESEARCH BEFORE DOING THIS as I don't know what will happen.
Good luck!

May sound dumb but do you maybe need to drill some more holes in your pots? I used some pos where the drainage holes were all on the bottom of the pot. It wasn't "designed" for the tupperware pieces I have the pots in to collect the extra water and sat too flat on the bottom against the tupperware. So I got out my drill and put in holes arund the bottom of the sides of the pot. Drainage problem solved!

The problem you come in to is that if the water doesn;t drain and the roots sit in it, root rot.

I had the same issue last grow my soil was like a sponge. You just need to be patient and let the soil get saturated and it will let loose of the water. I flushed 4 pots this way and trust me it took some time so just plan accordingly.