Can't Figure Out What's Gone Wrong (Hydro)

This is the first cannabis plant I have ever grown but have been doing hydroponics for quite some time now. I thought I'd try see if anyone else can work out what has gone wrong with my plant as I have spent hours trying to fix and correct it now. Last week I left the house for about 4 days and has setup everything to run automatically while I am away, I tested the system and everything turned on at the time it was meant to and off also. The lights and fans are on for 12 hours (11pm to 11am) every day since I have recently changed the light cycle for flowering, I also changed the nutrient composition to favour flouring too (I did this about 2 weeks ago so I doubt it's relevant to the issue). I use a grow tent for everything and a decent extraction fan too and the temperature inside the tent stays around 28 degrees Celsius and when I was running the light longer during veg it sometimes got to around 34 degrees Celsius and the plant had no problems with that. I returned home from my trip after 4 days to find a smell similar to steamed broccoli and also the plant had wilted and looked basically dead. Just before I had left for the trip the plant was extremely vibrant and green and the new upcoming flowers looked great. Some of the leaves had dried up and fallen off and all of the tips of the stems are limp and aren't pointed upwards. The leaves appear to be a darker bleak green colour compared to when I left. I checked the roots but they seem fine, they're still quite white and the water level was fine. I read somewhere that the light could be too intense and so I've dropped down the light intensity (I'm using an LED grow light that draws 200W and I turned off half of it now). I also changed out the water with fresh nutrient water when I saw it since I thought something I'd done could have been wrong. The PPM is sitting at 1050PPM and my tap water is around 240PPM. pH is stable at 6.0. I have attached photos, any input is much appreciated.

Looks like too much heat and/or not enought water to me.

dazza444 said:

smell similar to steamed broccoli

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I suspect not all your fans worked properly. All my timers have auto/manual & multiple program options, you might want to check that.
All my fans, ventilation and circulation, run 24/7, I recommend you do the same in the future.

Good luck

Just checked on the plant again and it appears to be getting worse. There is plenty of water and oxygen in the water since I have an airstone in there. Maybe some kind of disease preventing the roots from getting oxygen out of the water or getting water?

How do your roots look atm?
What´s your temperature ?
Is there anything broken on the stem/roots ?
Did the roottips turn brown or anything?
Could it be that the roots didnt get water for some time?
What´s the distance from Lamp to Plant?

chef123 said:

How do your roots look atm?
What´s your temperature ?
Is there anything broken on the stem/roots ?
Did the roottips turn brown or anything?
Could it be that the roots didnt get water for some time?
What´s the distance from Lamp to Plant?

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The roots are still quite white with a light brown tinge, temp in the grow tent is 27c atm but maxes out at 28c. The root tips don't look brown whatsoever and I've never let the water get below halfway. The distance from the light to the plant is currently about 20 - 25 cm.

Did the Water where the roots are in get too warm or did they have very low oxygen levels for some time?
Do the roots smell strange and are slimy?
How did the roots look like before the accident?

I´m just speculating but it could be too much temperature and starting root rot that caused this, but again this is very speculative, because everything else that could cause this seems fine.

chef123 said:

Did the Water where the roots are in get too warm or did they have very low oxygen levels for some time?
Do the roots smell strange and are slimy?
How did the roots look like before the accident?

I´m just speculating but it could be too much temperature and starting root rot that caused this, but again this is very speculative, because everything else that could cause this seems fine.

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It's possible that the water had low oxygen levels when I was gone, the roots have a white slimy texture to them and they smell bad. They look barely different from before I left for my trip but if anything they're a little bit more brown. Have already tried using hydrogen peroxide in the water yesterday in case of root rot.

dazza444 said:

It's possible that the water had low oxygen levels when I was gone, the roots have a white slimy texture to them and they smell bad. They look barely different from before I left for my trip but if anything they're a little bit more brown. Have already tried using hydrogen peroxide in the water yesterday in case of root rot.

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Post pic of entire grow and not just a top

they look wilted from lack of water but that's not it cuz its hydro and your roots look nice no root rot.there

Dont use h2o2 as that can burn off the fine root hairs that you actually want

25cm isnt that much and maybe the light is too close but I doubt that, that is the problem

water temp too warm.

You sure ph is 6.0?

How long in flower cuz you should consider putting it back in veg cuz they look fucked up.

No mention of nutes.

1050 is too much ppm and would recommend that you cut that in half

You could have the net pot too low in the water and you have some sort of stem rot going on but that is just a guess if that is even a thing but again the roots look nice so idk.

You haven't mentioned what you did or something happened to be able to point to the screw up. Unless the high ppms is the problem but in my experience they just burn up and dont wilt like that when I do that.

Looks like something got sprayed on it imo. I foliar fed a plant once that was about 1000ppms and it looked just like your plants over night.

Actually with what i read and can see that they are burnt up from too high of a ppm and said fuck it I quit.kill me. You using dry nutes like chem-grow or mega crop???

1050ppm and a 200w led wtf

root rot, the color of roots is no good try soaking roots in h202 it will help . peace

Since the roots are stinky and slimy they must have been deprived of oxygen for some reason.

I add 30% h202 everday and it never burns any of my hairs not even the the micro ones.

Op,

Change out your water and put in a 1/4 dose of nutes and 4ml of 30% h202 per gallon of water and mix it in a little at a time or you will burn them.

Really want qant to clean your system while you do this but it will be to hard with your setup.

After treating for 24 hrs as I said above you may want to switch out your water again since you cant clean your system. Fill again with what ever your full strength nutes is and 4ml of 30% h202 per gallon.

After this add 2ml per gallon of 30% h202 everyday.

Its what I do and look at these babies! If you get real close on the partial photo you can see the hairs.

P.s. if you cant get 30% just use 3% and the math is simple considering your going from 30% to 3%.

shawnery said:

I add 30% h202 everday and it never burns any of my hairs not even the the micro ones.

Op,

Change out your water and put in a 1/4 dose of nutes and 4ml of 30% h202 per gallon of water and mix it in a little at a time or you will burn them.

Really want qant to clean your system while you do this but it will be to hard with your setup.

After treating for 24 hrs as I said above you may want to switch out your water again since you cant clean your system. Fill again with what ever your full strength nutes is and 4ml of 30% h202 per gallon.

After this add 2ml per gallon of 30% h202 everyday.

Its what I do and look at these babies! If you get real close on the partial photo you can see the hairs.

P.s. if you cant get 30% just use 3% and the math is simple considering your going from 30% to 3%.

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this giy know what he talking aboit very good advicep

I'll be surprised if they come back. They look 90% dead to me. Keep us posted.

he can do it he can fix the plants and breathe life back into those plants they are still living have a chance still just need some love and tenderness

What is humidity when it’s 28c?more important what is the nute temp?
Ya the roots got cooked. Cover up the bucket.
As said above stem rot, hot water feedline right on the stem.

Bernie420 said:

Post pic of entire grow and not just a top

they look wilted from lack of water but that's not it cuz its hydro and your roots look nice no root rot.there

Dont use h2o2 as that can burn off the fine root hairs that you actually want

25cm isnt that much and maybe the light is too close but I doubt that, that is the problem

water temp too warm.

You sure ph is 6.0?

How long in flower cuz you should consider putting it back in veg cuz they look fucked up.

No mention of nutes.

1050 is too much ppm and would recommend that you cut that in half

You could have the net pot too low in the water and you have some sort of stem rot going on but that is just a guess if that is even a thing but again the roots look nice so idk.

You haven't mentioned what you did or something happened to be able to point to the screw up. Unless the high ppms is the problem but in my experience they just burn up and dont wilt like that when I do that.

Looks like something got sprayed on it imo. I foliar fed a plant once that was about 1000ppms and it looked just like your plants over night.

Actually with what i read and can see that they are burnt up from too high of a ppm and said fuck it I quit.kill me. You using dry nutes like chem-grow or mega crop???

1050ppm and a 200w led wtf

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During veg it was 1000ppm no issues. I was told to use up to 1400PPM during flower just by reading some articles online. Don't see why it would do this now with the same ppm unless the different composition of the 3 part nutes are causing it to burn? Will try lower it down and see how it goes. Just checked now and ppm is at 871 (see photo).

70's natureboy said:

I'll be surprised if they come back. They look 90% dead to me. Keep us posted.

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If so it'll suck for sure but I guess I can just use some of the clones I have to start over.

shawnery said:

I add 30% h202 everday and it never burns any of my hairs not even the the micro ones.

Op,

Change out your water and put in a 1/4 dose of nutes and 4ml of 30% h202 per gallon of water and mix it in a little at a time or you will burn them.

Really want qant to clean your system while you do this but it will be to hard with your setup.

After treating for 24 hrs as I said above you may want to switch out your water again since you cant clean your system. Fill again with what ever your full strength nutes is and 4ml of 30% h202 per gallon.

After this add 2ml per gallon of 30% h202 everyday.

Its what I do and look at these babies! If you get real close on the partial photo you can see the hairs.

P.s. if you cant get 30% just use 3% and the math is simple considering your going from 30% to 3%.

Click to expand...

I'll have to find some online, they don't sell it in any stores and I've looked for the ones specifically with no stabilisers.

myke said:

What is humidity when it’s 28c?more important what is the nute temp?
Ya the roots got cooked. Cover up the bucket.
As said above stem rot, hot water feedline right on the stem.

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Humidity is currently 54% but sometimes drops as low as 30%. Water temp is 24c. Just removed all the clay balls to reveal the stem and I think we may have a winner, base of stem is gross smelly and white. I feel stupid for not checking this earlier. I've attached a photo and it looks like I filled the water too high up. Any ideas as to how I can fix this?

Not sure you have time to wait for stabilizer free h202. I've used 3% many times and I haven't tasted or noticed a difference i the way the plnta react or grow.

This stuff breeds so quickly it's crazy.

I got all the way up to 1900ec during veg and that is high, 1400ppm sounds crazy and that's 2800ec!, but in flower my girls have gone all the qay down to 900ec. I've only done 3 grows but each grow the ec dropped significantly later in flower unlike everything I had read till that point.

P.s. I have also read that to high of an ec can cause root issues as well not that this is the case bit just a heads up. Less is more when it comes to cannabis.

Sudden wilt from the rockwool being in the water all the time. Got to keep the RW up out the water and treat it like dirt meaning you have to let it dry from time to time.

different composition of the 3 part nutes are causing it to burn? happened to me switching to chem-gro so its possible imo. I would lower ppms even more 550 if you were to try to fix it and go back to veg.

You could try to foliar feed a really light ppm 150 once a day.

I doubt they will come back

Have you considered sabotage?

1050ppm seems very strong to me.
My cheap ph meter is constantly sabotaging me lately...