Help!! My two babies are burning over night because of urea!!

I am growing two plants one big bang and the other rocklock both were doing exceptionally well till i added a bit of urea which after watering overnight which has now turned a lot of the leaves brown and curly. They are into the 2nd week of flowering. What can i do to save them. I flushed them yesterday with about 8 litres of water and am checking on them regularly.
A few questions
should i cut off the brown leaves?
Should i repot them?
what else can i do to save them as they were doing beutifully well outside.
I have added pictures i found on google which look like the problem i will addsome tommorow of the affected plants. Kindly advise if there is anything i could do thanks

you've done the right thing.

If you already flushed your going to want to give the plant a good watering that will allow for some runoff the next time you water. Leave the leafs as is. The plant is obviously burnt from the nutrients you gave it so make sure for the next 7-10 days to just give the plain 6.2-6.8 ph water.

How much urea and ... why urea? cn

smokebros said:

If you already flushed your going to want to give the plant a good watering that will allow for some runoff the next time you water. Leave the leafs as is. The plant is obviously burnt from the nutrients you gave it so make sure for the next 7-10 days to just give the plain 6.2-6.8 ph water.

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Spot on Dwigt! haha!

A ppm meter will help you out too, that way you can monitor how hot that urea is getting you nutrient solution.

I tried using urea as a fertilizer as where i am there isn't anything else i can use . All i wanted to do was give them a boost which i now realized was stupid as they were doing very good without it. I only put a minimum amount but i think the plants had all they wanted. My Big Bang plant has been affected most as you can see from the pictures. It still has a few good leaves and off shoots i was thinking should i take cuttings before they burn up aswell? here are the pictures do you think if i keep flushing them once a day it they may recover after looking at the picture. Thanks for the help!

good job flushing!