Nutrient burn after underwatering

[Zeytan]

Hey there !!! Since PotPros is down i decided to ask few questions here even if my plants are photos !

So here we are approximately at week 4 in flowering stage, and I had a little problem of leaves curling down. First i thought it was overwatering, i was only giving half a liter of water to each of my plants (3 actually) but it was kind of obvious it was more underwatering then anything else. I have 15L Pots, and a 600W LED light. So i decided to feed them with 1,5L of tap water, and now leaves a curling up again.

But one thing i didn't see coming, is by feeding them 1,5L, all the roots have now access to the nutrients left in the soil. And I've spotted some nutrients burn. After the soil dried out, i feed them again with 1,5L of tap water. My question is: Can i solve my over fertilization issue with Tap Water only ?? Since i put a scrog net, its impossible for me to move the plant and make a flush... So I would be happy if someone could tell me if I really need to flush these pots, or if i can continue with tap water, and the levels are gonna stabilize themselves???

 

[namvet25]

First off,what type of nutes are you using?NPK values and how at what dosages?

 

[Zeytan]

I've got a HydroPassion MasterGrower Nutrient Kit
Veg Stage NK 9-6
Flow Stage PK 11-8
Bloom PK 50-33

I used to feed them 0,5L every day, feeding them with nutes every 2 or 3 feeds (3 most of the time). All the measures are for 10L, so i divided them to get the perfect value for 1L. While i always used 1,5L of water... So it should be just fine...

I didn't really wrote down. I just know that i never exceeded 1,5ml of Veg, and 1ml of Flow. Didn't really used the bloom yet (Only 3 times, and with very small amounts). I slowed down veg nutes during flowering aswell

Don't know if this info is valuable, but, the burned tips are curling up...

Thanks

 

[Zeytan]

I also use Biobizz Light Mix soil in 15L pots.

 

[Renaissance Redneck]

@Zeytan , pics would help if you're able but underwatering can cause problems too.
It can allow salts to build up in the soil (N is basically a specialized salt). So when salt builds up, and is suddenly mobilized by water... yep, it can burn. Not to mention how wet/dry cycles can screw with your soil pH
Without seeing what's going on, I can't give much of an opinion, but I can say that my firm belief is to always water slowly to runoff, 10 to 15%.
It helps move excess salt from the soil, and creates a slight vacuum effect that pulls O2 back into your profile.

 

[Waira]

..Pics mate, we can't solve anything by just words alone,...

 

[Renaissance Redneck]

..Pics mate, we can't solve anything by just words alone,...

The last thing I got right without a picture was when the turtle bit my testicles. And I'm still not sure it was a turtle.

 

[Waira]

.... oh gawd, what a mental image that is! ...does beg the question, just how you managed to dangle your clockweights so low that a turtle could mistake them for food! certainly, the water was warm,...

 

[F.N.]

I've got a HydroPassion MasterGrower Nutrient Kit
Veg Stage NK 9-6
Flow Stage PK 11-8
Bloom PK 50-33

I used to feed them 0,5L every day, feeding them with nutes every 2 or 3 feeds (3 most of the time). All the measures are for 10L, so i divided them to get the perfect value for 1L. While i always used 1,5L of water... So it should be just fine...

I didn't really wrote down. I just know that i never exceeded 1,5ml of Veg, and 1ml of Flow. Didn't really used the bloom yet (Only 3 times, and with very small amounts). I slowed down veg nutes during flowering aswell

Don't know if this info is valuable, but, the burned tips are curling up...

Thanks

I would give it a healthy drink of water and proceed But a picture or two would really help

 

[Zeytan]

Honestly since my phone crashed onto the floor, i cannot take anymore pics...
Im gonna try to but honestly the first shooting didn't let you see what i was talking about

I know that it's a nutrient burn, the edges of my tips are burned and curling up on themselves. I'm only watering them with tap water, but, this seems to spread without stopping. The fact with pictures, is that you are not really gonna tell me more about what i already know. I'm mostly here to know if these levels are gonna stabilize themselves by watering without nutes or not. Since i can't flush because of the scrog net, I really want to be sure that even if they suffer for now, this is all gonna end and they'll get back from their injuries...