Quick question- advice needed

I have 5 trays eb&flow, 2 to 3 plants in each tray. All trays are fed by same res. They run anywhere from 1 wk flower to 4wks on perpetual grow.
I have 1 plant that is showing moderate nitrogen def. It is in 2nd oldest tray, with no signs of any def. in the other plant in the same tray. They are diff strains, but i have a cpl of the same strain in other trays with no problems.
My question is, how can i add some nitrogen to the 1 plant with out adding to all of them?
Any advice or tips would be greatly appreciated.

As far as I know you can't, but that's not my style of growing. So bump! for someone who can.

Thanx, guess i should have mentioned theres some pics in a journal on my profile. Sorry, bout that. I just cant figure why 1 plant woukd have problems. Their are several other plants who were cut from same mother with no probs at all.
Thanx again, I wonder if i was to top feed her thru the pot if that would work?

How often are you flushing and cleaning the res.

If in flower I always did it once a week, drain and wash with warm water and soap then refil. To answer your question mix 25 percent of recomended amount of grow to the fluid that will not hurt your other plants and you will get what you need to the other one that is def.

At the end of the week check the results or effects if the plant is getting better if it is mix it again at the level. Bottom line is you are not going to hurt the others and by going 25 percent you will be ok.

chrishydro said:

How often are you flushing and cleaning the res.

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On average evry 7 dys, no more than 10

chrishydro said:

If in flower I always did it once a week, drain and wash with warm water and soap then refil. To answer your question mix 25 percent of recomended amount of grow to the fluid that will not hurt your other plants and you will get what you need to the other one that is def.

At the end of the week check the results or effects if the plant is getting better if it is mix it again at the level. Bottom line is you are not going to hurt the others and by going 25 percent you will be ok.

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Sweet, going to clean res now.
Thanx for the great tip. would hate to lose 1 of them as i'm trying my first perpetual harvest