What do you think is happening to my plants?

daniel byron

daniel byron

Active Member
Hi All-

I am a first time grower having problems. I would love if you could help me assess what is wrong with my plants so I can fix it. Here's some information about my setup.

Hydroponic DWC indoor grow with air stone and micro, bloom & grow nutrients switched out weekly.

Well ventilated with average temperature of 78°F. (1) 300w (168w actual) LED hydro galaxy grow light.

(3) OG Kush plants currently starting 4th week of flowering. PH checked regularly, and typically ran high at 7. I was using lemons to adjust PH, but PH would creep back up quickly after adjusting. I just switched water out tonight with nutes and adjusted PH to 5.8 using PH down (earth juice).

2 weeks ago I started seeing yellowing of the leaves, and it spread rapidly. I guessed it was a nitrogen deficiency due to the PH being too high. I pruned the yellow and dead leaves tonight and took a picture to help try and solve this.

I've included some photos of the plants when they were younger so you can see the progression. Any information on how I can fix this would be really appreciated.. Thanks!
 

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I like all the work you have put into your growing. I don't do hydro so can't help. Just liking what you got going. Most of us start out small and eventually expand.
Some one here will help you out on the yelowing leaves...
Keep on keeping on
 
I don't do hydro either, like your setup. As you said, it looks like N def to me. Maybe K def in one photo. But, more N def. Did you change to a so-called "bloom" schedule (or nutrient product)? Often people "flip" to a bloom product and it doesn't have enough N.

What do you feed?
 
If picture 5 and 6 are of the plants currently, may I ask about your statement "4th week of flowering"? When you say 4th week, is that since flip or since you started seeing flowers? I only ask because those buds look much further along then 4 weeks.
 
I'll admit I'm not a Dro guy and so they may grow that fast in Hydro...just askin.
 
If you say what you feed (including the amount) I can tell you your NPK ratio. It should be around 1-2-2 in flower (I suppose, I'm not familiar with hydro. I think they run higher PK in flower, higher N in veg, than I would in soil.). If you're at something like 1-4-2, that would indicate something.

I use this spreadsheet to work out the NPK ratio resulting from multiple bottles. You can do it too (if you're worried about being criticized about your choice of nutrient brand.). It's easy to do. Much better to know.
 
Don't the Hydro guys always point to a root problem developing when the pH starts swinging too rapidly?
 
Here's a picture of the roots. Air pump is 3.2L. Incidentally, the only plant of the four that is really thriving is situated directly above the air stone.
 

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Several things.
Space is pretty small, maybe too small.
You're over feeding. Are you using both bloom and veg nutes? just one should be necessary.
You probably don't need to play the pH game so much. I don't remember you writing your ppm. ppm is more important than pH because ppm causes pH, not the other way around. I've seen a wide range of ppm usage, from 500 ppm in late growth to 1100 or more. I'd say for you now, maybe 700 for a while and see what happens. you need a ppm meter to know what your ppm is. don't worry about pH so much. plants grow in a range of pH pretty well. for hydro you could probably use a range of 5.9 to 6.5 or so without too much trouble.
 
Here's a response I got from ic mag forum:

growaway;7244693:
Nice stealthy little setup ya got there friend! Looks a little like early sequestering of nutrient from your foliage because of root zone uptake issues. Lots of anthocyanins in your petioles and stems too. This could be strain related but given your other symptoms i hazard its all related. 'P' lockout secondary to cold air and/or nutrient temps and salt build up are commonly the cause of this for me. I agree with other members that N uptake is also occuring so salt build up is prob more likely of the two. I can see a little salt build up on your expanded clay also. Calcium sulphate most likely. Check your minimum temps and solution temp are not too low and give the system a "flush" and then feed at normal strength again would be advice. Your bud development seems reasonable so unless she defoliates rapidly, you should be ok. Love to see some follow ups if you get a chance. Cheers.

I posted this question to two other forums,
http://support.ilovegrowingmarijuana.com/t/what-do-you-think-is-happening-to-my-plants/3717
https://www.icmag.com/ic/showthread.php?p=7243861#post7243861

and I got about ten responses in total with possible issues ranging from: PH too high, PH fluctuations, too much PH down, feeding too much, feeding too little, poor nutrient brand choice, K deficiency, Needed CalMag, too small of a space, too high (or low) ppm, air pump too small to aerate roots, and Nutrient uptake at roots.

It was a little frustrating to get so many contrasting responses, but it prompted some research on my end, and I am inclined to agree with growaway's response.

Here's a little more info: My reservoir and air temps are both 77.9°F. I have always used 100% RO water. My roots do appear to be showing some signs of rootrot, although I can't be sure that they aren't just stained from nutrients... I have attached a couple pics of the roots. Do these look rotten?

I know in future grows, I will add additional air stones in the reservoir. Does Hydroguard do anything to prevent or cure root rot? Also is 78° too hot for the reservoir temp? How long should I "flush" the system, for a day? Or should I just keep running clean water through? Also should I clean out the reservoir?

Thanks all for the info! Any other advice you can provide would be helpful.
 

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Here's a response I got from ic mag forum:


growaway;7244693:
Nice stealthy little setup ya got there friend! Looks a little like early sequestering of nutrient from your foliage because of root zone uptake issues. Lots of anthocyanins in your petioles and stems too. This could be strain related but given your other symptoms i hazard its all related. 'P' lockout secondary to cold air and/or nutrient temps and salt build up are commonly the cause of this for me. I agree with other members that N uptake is also occuring so salt build up is prob more likely of the two. I can see a little salt build up on your expanded clay also. Calcium sulphate most likely. Check your minimum temps and solution temp are not too low and give the system a "flush" and then feed at normal strength again would be advice. Your bud development seems reasonable so unless she defoliates rapidly, you should be ok. Love to see some follow ups if you get a chance. Cheers.

I posted this question to two other forums, and I got about ten responses in total with possible issues ranging from: PH too high, PH fluctuations, too much PH down, feeding too much, feeding too little, poor nutrient brand choice, K deficiency, Needed CalMag, too small of a space, too high (or low) ppm, air pump too small to aerate roots, and Nutrient uptake at roots.

It was a little frustrating to get so many contrasting responses, but it prompted some research on my end, and I am inclined to agree with growaway's response.

Here's a little more info: My reservoir and air temps are both 77.9°F. I have always used 100% RO water. My roots do appear to be showing some signs of rootrot, although I can't be sure that they aren't just stained from nutrients... I have attached a couple pics of the roots. Do these look rotten?

I know in future grows, I will add additional air stones in the reservoir. Does Hydroguard do anything to prevent or cure root rot? Also is 78° too hot for the reservoir temp? How long should I "flush" the system, for a day? Or should I just keep running clean water through? Also should I clean out the reservoir?

Thanks all for the info! Any other advice you can provide would be helpful.
 

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daniel byron said:
Here's a response I got from ic mag forum:

growaway;7244693:
Nice stealthy little setup ya got there friend! Looks a little like early sequestering of nutrient from your foliage because of root zone uptake issues. Lots of anthocyanins in your petioles and stems too. This could be strain related but given your other symptoms i hazard its all related. 'P' lockout secondary to cold air and/or nutrient temps and salt build up are commonly the cause of this for me. I agree with other members that N uptake is also occuring so salt build up is prob more likely of the two. I can see a little salt build up on your expanded clay also. Calcium sulphate most likely. Check your minimum temps and solution temp are not too low and give the system a "flush" and then feed at normal strength again would be advice. Your bud development seems reasonable so unless she defoliates rapidly, you should be ok. Love to see some follow ups if you get a chance. Cheers.

I posted this question to two other forums,
http://support.ilovegrowingmarijuana.com/t/what-do-you-think-is-happening-to-my-plants/3717
https://www.icmag.com/ic/showthread.php?p=7243861#post7243861

and I got about ten responses in total with possible issues ranging from: PH too high, PH fluctuations, too much PH down, feeding too much, feeding too little, poor nutrient brand choice, K deficiency, Needed CalMag, too small of a space, too high (or low) ppm, air pump too small to aerate roots, and Nutrient uptake at roots.

It was a little frustrating to get so many contrasting responses, but it prompted some research on my end, and I am inclined to agree with growaway's response.

Here's a little more info: My reservoir and air temps are both 77.9°F. I have always used 100% RO water. My roots do appear to be showing some signs of rootrot, although I can't be sure that they aren't just stained from nutrients... I have attached a couple pics of the roots. Do these look rotten?

I know in future grows, I will add additional air stones in the reservoir. Does Hydroguard do anything to prevent or cure root rot? Also is 78° too hot for the reservoir temp? How long should I "flush" the system, for a day? Or should I just keep running clean water through? Also should I clean out the reservoir?

Thanks all for the info! Any other advice you can provide would be helpful.
Click to expand...


I'm guessing somewhere in there is the answer. :bigjoint:
 
one of the things you learn is that people can use the internet to communicate whatever they want. whether they are right or wrong seems to be irrelevant to them. consequently, we see a lot of strange information that may not make any sense. I've yet to really see someone in these forums that is very educated in plant biology. most people are just guessing based on bad info they've read in the past. I stand by my previous post that you're over feeding. I don't now about hydroguard but I've heard good things about it. if there is any light getting to your water, the brown could be algae if it is slimy. if not, it could be fert stain or root rot. If you could get the temp down a little, that might be smart. For a poster to make this statement - "'P' lockout secondary to cold air and/or nutrient temps and salt build up are commonly the cause of this for me" when you say your temp is 78F doesn't make sense because his example doesn't apply to you and that temp. Salt buildup isn't a problem. It's the overfeeding that is a problem. You still make no mention of your ppm level but knowing this can be pretty important in hydro. you're focused on pH but you should worry more about the right ppm level first. Interesting you ask for help elsewhere yet apparently no one makes mention of you ppm levels. you have dark green leaves and dying leaf tips which usually mean over feeding. I've been reading online grow forums since 1999 when overgrow was running and there was confusing info put there too. I had to read books and learn on my own because coming to the web didn't work out too well.
 
You have root rot. 78 degrees is to warm for nutrient solution, the warmer the solution the less oxygen it holds. Knowing your ph/ppm/temp are vital in hydro, but without healthy roots it doesn't really matter. You gotta get it under control. Ive never used hydroguard, a lot guys use h2o2, ive always used chlorox bleach for root rot @ 1 or 2 drops a gallon. it doesn't work overnight, but it does work.
 
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