Please Help! Yellow leaves, root rot?

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wweweeweed

Member
Our white widows are just starting their 4th week of flower in a hydro ebb and grow. In the last 4 days their leaves have been turning yellow. It started with the old fan leaves and has now covered most of the plant, except for the lowest branch or two. Some of the plants have it worse than others. Our PH got up to 7.3 for a a few days before the yellowing started. Thought that was the problem but he PH has been at 5.5-6.2 for the last five days and they have gotten worse. Lifted up the plants and noticed that the few roots that were hanging out were brown and a bit slimy. What do you guys think? Weve cleaned out the whole system and given new fresh nutes. Please help.

P.S. The leaves are more yellow than the pics show
 

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jcdws602

jcdws602

Well-Known Member
If you can look at the roots,if they are looking kinda brown then root rot might be the prob,a good cheap solution is h2o2 or as most of us know it by is hydrogen peroxide,the best kind to use is 35% kind but the 3% one that they sell at the drug store is fine if you have some around add a couple ml per gallon,but the main goal is to find out why the root rot is occurring if that is the issue,it could be a nutrient deficiency or toxicity........how often do you flush??
 
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wweweeweed

Member
i change the reservoir once a week, but only have flushed out the tubes once. i put in some hydrogen peroxide (3%) earlier today, so its too soon to tell if it has begun to make a difference. is root rot something that my plants will likely recover from...or is is this the end of the line???
 
moash

moash

New Member
I think its 30 ml per gal
it depends how bad it gets and if u fix the prob ,if they recover
 
jcdws602

jcdws602

Well-Known Member
I would flush with something like clearex or any flushing agent you can get a hold of to be safe also,I don't know if you add h2o2 frequently but it's a good idea to use every res change and once or twice in between in order to prevent root rot,if it is not that bad they will surely recover but there is gonna be substantial overall damage that will effect yield.Do you know if there is water that does not drain into the res,that is the most common factor for root rot in ebb and flow systems,roots drown in pools of sitting water,the solution is easy if that is the prob just level it out so all the water drains properly.....
 
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wweweeweed

Member
there has always been a little bit of water at the bottom of the pots (about 2 inches) when the water has drained back from the reservoir. i assumed that it would be ok for the roots to be sitting in a little bit of the water since the instructions coming with the ebb and grow system suggested keeping the pots on the same water level as the controller bucket. i have since raised the buckets up an inch or so, should the water drain completely out of the buckets when they are not being watered? if so i will go ahead and do this tomorrow. i looked up clearex, the description makes it sounds like a symptom it is used to cure is wilted leaves form an excess of salts on the roots?? i will make sure to use hydrogen peroxide periodically to keep the system flushed from this point out. the situation doesnt seem to be worsening, but at the same time not much in the area of improvement. will keep updating
 
moash

moash

New Member
its not good for the roots to sit in stagnant water unless u got some king of oxygen supply,such as an air stone
i think jc is spot on with that one
 
jcdws602

jcdws602

Well-Known Member
wweweeweed said:
there has always been a little bit of water at the bottom of the pots (about 2 inches) when the water has drained back from the reservoir. i assumed that it would be ok for the roots to be sitting in a little bit of the water since the instructions coming with the ebb and grow system suggested keeping the pots on the same water level as the controller bucket. i have since raised the buckets up an inch or so, should the water drain completely out of the buckets when they are not being watered? if so i will go ahead and do this tomorrow. i looked up clearex, the description makes it sounds like a symptom it is used to cure is wilted leaves form an excess of salts on the roots?? i will make sure to use hydrogen peroxide periodically to keep the system flushed from this point out. the situation doesnt seem to be worsening, but at the same time not much in the area of improvement. will keep updating
Click to expand...
The clearex is for salt build up,which is good to flush with at least once a month just as a preventative measure.Yeah by the sounds of it that sitting water was your prob,remember roots need oxygen,they will "drown" and start to rot away,as long as they don't dry out between watering cycles they will be fine,and yes all the water should drain into the res.It won't be too long before you'll start to see green growth again.......
 
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Patiwan Grl

Active Member
Is the Ebb and Gro different from the Multi-Flow??? I thought these were nearly identical systems? My MF is designed to retain a res of solution in the bottom of each planter. Roughly the lower 1/3- 1/2 of the roots are continuously submerged. Keeping the res chilled to the proper temp and highly oxygenated and watering as freqently as needed prevents stagnation and keep root rot at bay.
 
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donnie189

Active Member
Last time I done this a year ago, the same thing happened, and they ALL died. I been trying many different ways growing 5yrs. I generally get something, and is the best. I decided the best I ever did was ebb & flow, so even though they all died a year ago, I'd clean my clay pellets good. I have been leaving the water on except during dark. It only comes on 4times 30min. at a time 16hrz.
What does everybody think?

Happy Holidays!

[email protected]
 
jcdws602

jcdws602

Well-Known Member
I flood 15-30 minutes max 3 times a day while lights on.Everything goes pretty smooth unless I get lazy thats when problems start to occur.The worst part of ebb and flow if you use hydroton is cleaning them damn things...but other than that ebb and flow is pretty simple and effective way of growing.
 
IgrowUgrow

IgrowUgrow

Well-Known Member
yellow leaves are normal towards the end of flower because the sugars and resin out of the fan leaves go into the bud and the fan leaves turn yellow and die off.
 
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wweweeweed

Member
so i raised the buckets so they no longer have any water sitting in them while they are not being fed...seems like a pretty big design flaw if this is such a problem. I went to the local grow shop the other day to get another opinion and they were worried that it could possibly be a sign of too much nutrients, so i diluted the reservoir a bit. they seem to be recovering...just not fast enough :)

i have them being watered 4 times a day, once every 6 hours. is there an advantage to watering them more frequently when the lights are on and less when the lights are off?
 
moash

moash

New Member
Yes ,u wont down ur plants
the medium will not dry out as quick when the lights r off,so less water is needed
if u keep ur plants sitting in water,they will not recieve sufficient oxygen and u will have the same problems
 
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