Help! Burned plants keep getting worse.

[chinese-mecican]

we use a promixBX mixed with foxfarm soil we start with a 1/2 gallon move to a one gallon during veg then into two gallon pots for flowering.

we are using AN sensi grow A+B for vegetative and everything is great until flowering. the first two weeks we use sensi bloom part A+B. week three we switch connoisseur and big bud and carbo load. we only use 1 ml per L of coni because we have heard of it potential to burn plants and we use about half of suggested doseges of big bud and carbo load. About two weeks into flowering are plants started to yellow and things just got worse after we fed them coni. the got more yellow and burned from the tip of the leaf and moved inward. we gave them revive in week four with little positive results. what can i do to help my girls out? what do i need to do in the future to avoid this? P.S we havent been testing our P.H. could that be the problem

 

[mexilandrace]

yes ph could be your issue, pictures would be awesome though, just to get a better idea on our end.

 

[chinese-mecican]

here you go

 

[greengorillaz]

are you using a hydro hut?

are you using a hydro hut?

Looks like off gassing caused by the plastic used in hydro huts.

we use a promixBX mixed with foxfarm soil we start with a 1/2 gallon move to a one gallon during veg then into two gallon pots for flowering.

we are using AN sensi grow A+B for vegetative and everything is great until flowering. the first two weeks we use sensi bloom part A+B. week three we switch connoisseur and big bud and carbo load. we only use 1 ml per L of coni because we have heard of it potential to burn plants and we use about half of suggested doseges of big bud and carbo load. About two weeks into flowering are plants started to yellow and things just got worse after we fed them coni. the got more yellow and burned from the tip of the leaf and moved inward. we gave them revive in week four with little positive results. what can i do to help my girls out? what do i need to do in the future to avoid this? P.S we havent been testing our P.H. could that be the problem

 

[chinese-mecican]

We have good ventilation and it doesnt get too warm in there.

 

[greengorillaz]

Just wondering

Just wondering

We have good ventilation and it doesnt get too warm in there.

Are you using a hydro hut?

 

[chinese-mecican]

it is a homebox xl, and it's our third grow and it's the first time this has happened.

 

[chinese-mecican]

any suggestions

 

[libby]

any suggestions

P.S we havent been testing our P.H. could that be the problem



Did you check ph on previous grows?

Of course ph could be your problem. I'm no pro but, notice some people don't seem to care about ph.

I personaly think ph should come before everything else, i mean, what's the point in giving your plant any any food, then leaving a barrier in between, saying "sorry, you not getting any food.

 

[green_grow]

"some people don't seem to care about ph."

when you put 1 tbsp. dolomite lime per gallon of soil mix, you stop caring about ph. my understanding is that peat becomes more acidic over time, so if you haven't limed your soil mix, ph could be your problem.

 

[Mr. Burgundy]

I am suffering the same thing with two of my babies I have in my flowering room (BOG Super Sweet Cindy & a FLO/Plan B indica). I have had this problem in DWC and it ruin the whole batch. Now that I am in coco and a perpetual harvest flower room, I only have 1 or 2 affected at a time. I have heard lockout/ph issues for mine as well. I am not going to cull, but try to save them instead. I would love to see how yours turn out.

 

[robotwithdreams]

What week are those pictures from?

I think you may have switched to nutes lacking nitrogen way too soon and started hitting them with excess phosphorus too soon.

Im really not familiar with the line of nutes you use, so take my advice with grain of salt. Whats the magnesium content in you nute? Whats "revive"?

I think the consensus here seems to be that adding 1/2 to 1 tbs of dolomite lime helps to keep p.h from getting too acidic, especially with ocean forest and most nute programs. However if your problem started soon after intiating flowering, I have doubts about your soil getting too acidic since ffof has some oyster shells or something that should keep soil from getting too acidic that early.

For future reference continue with veg nutes into first couple of weeks of flowering albeit at a lower dosage while introducing your flowering nutes.
Also go ahead and add some dolomitic lime next time around. I also suggest adding perlite to the ocean forest, another 10% should suffice.