Sick Plants! frustrated!!

This is the second grow my plants have done this... Healthy girls, until in flower about 2 weeks, and the leaves start to curl, turn light green, and droop.

I thought it was root rot, but I have cut back on flood level to make sure the medium is drying out. -
-ph is 5.6-6.0.
-using h2o2
-temp 71-82F

This setup has produced well several times before the last 2 runs. rockwool cubes, ebb flow. GH 1200 ppm.

I have flushed twice. no improvement.

I am about to snap.

when plants are put into flowering they cause a little droop...they dont look that bad

Is it possible for the humidity to be to low? it's around 30-40%.

or res temp maybe to warm?>

they look like they have a "N" overdose....that humidity is fine...

also the leaf on this pic looks like a phosphorus deficiency...check this

out:http://www.icmag.com/ic/showthread.php?t=11688 ....meangreen

so you're using peroxide only? No real nutes? I don't understand that? I agree that there is a possible phos deficiency by the yellowing of the leaves I see...

What is the advantages of using h2o2? I've heard about people using this, but I don't really know what it is used for to accomplish. Someone please educate me. thx.

h2o2 is a must IMHO for hydro growers, 1. It helps further oxygenate the water 2. It helps clean the water of bacteria,fungi,algae etc.

Some people say you cannot use 3% or regular h2o2 from a drug store that you need to use like the 30+% stuff from grow store but I disagree. I have used plain 3% h2o2 as much as 2 cups per 6 gallons every 4-5 days with great results!

Dude turn your fan off.

Tiger said:

Dude turn your fan off.

Click to expand...

Do what??? lol says the guy with one post.... a fan would have nothing to do with anything

Let me reiterate. If you turn your ocillating fan off, it will quit leaching the moisture out of the plants and solve your problem. It worked for me.

Tiger said:

Let me reiterate. If you turn your ocillating fan off, it will quit leaching the moisture out of the plants and solve your problem. It worked for me.

Click to expand...

Ridiculous, newbie. That has nothing to do with what he said. He didn't once mention having a problem with moisture being leached out of his plants...I simply asked him why people use h2o2, and what the potential benefits are..

EDIT:
oh wait, you're talking to the original poster....

H2O2 is great for controlling bacteria and adding O2 to the water. I've heard you should avoid using 3% because it has stablizers in it such as "phenol, acetanilide, and sodium stancite". But something like 35% food grade doesn't have these stabilizers. I've also heard of using 50% lab grade that is made for swimming pools. IMO it's better to get as strong as u can find. In order to achieve a decent stregnth with 3%, you literally need a whole 16 oz (large) bottle per 15 gallons. It gets really tedious if your adding a bottle every week or so. Dosing more often is advisable as it dissipates after 3-4 days. The way I monitor it is simply watching the bubbles on the tank, almost like bubbles in pop. If there's a lot of bubbles, good chance it's still going strong. Hope this helps, I don't have a ton of experience but I'm learning

From Al. B Funct... sorry it's in metric, use google to convert to your needs... I normally use half this strength though, unless I have a bacterial breakout.
3% - 17ml/l
35% - 1.7ml/l
50% - 1ml/l

P.S. When working with anything above 10% it is advisable to wear gloves and eye protection. A drop of 35% will literally turn your dead skin white and can cause serious burns.

Now, to help the original poster...

Are you using rockwool cubes alone? I have found pure rockwool holds too much water and not enough o2. How much h2o2 are you using? Did you start using it to increase dissolved o2 or for bacterial purposes?

I'm guessing root rot. I'd suggest trying a different medium next round. I'm currently using 4" blocks in hydroton w/ 2 gal pots. Next grow I will be using a 50/50 mix of hydroton and rockwool mini cubes (1/4" or so). Droop is almost always due to root issues, but remember they do droop at the end of a long day of light. Check in the morning, are they perky? See if it has a pattern you can put your finger on.

And, look into Smart Pots. They are a little pricey and somewhat of a pita to clean roots out of (but washer safe), but they are also light and allow more oxygen to reach the medium then a hard plastic pot. They also promote fine feeder roots, rather then the thick long, spiraling roots hard plastic pots tend to promote.

Try cutting back to 600ppm. They are overfed. Some strains just aren't that hungry man, they have definitely developed "The Claw". It can be hard to fix with hydro because the N level is actually pretty high on GH and AN products to promote good foliage growth. The problem is that some strains don't need NEARLY that much in flower and it fucks them up just like the ones you have there.

I grew Blue Cheese and WW together using the same reservoir and to keep the WW happy I had to let the Blue Cheese get overfed just like yours. If the Blue Cheese had been alone I would've cut back.

Cut back on the nutes or feed just plain water even for a couple of days, you'll see, they will bounce right back. 1200....too high.

I agree, could be overfed. You should be monitoring your ppms daily. If it's rising your overfeeding, if it falls underfeeding. If your dialed in the ppms shouldn't fluctuate much from day to day.

I accept with information:That has nothing to do with what he said. He didn't once mention having a problem with moisture being leached out of his plants.

I actually just have the my oscillating fan off. I have left 1 fan blowing down on the plants trying to get air to the roots.

I have always used the 3% h2o2 with good results, about 1 oz per gallon. Also use aerator in res.

Thats why this problem is killing me, it appears to be overwatering/ rootrot but my efforts to correct it have not helped. I just let them go w/o water for 48 hours in effort to really dry the roots. Just hope I dont kill them.

I think I might not be letting them root enough into the bigger pots.

Also going to hit them with one more flush with ph'd water and some h2o2, and cut back on the ppm to about 600.

Thanks for the input fellas.

zigzag24 said:

This is the second grow my plants have done this... Healthy girls, until in flower about 2 weeks, and the leaves start to curl, turn light green, and droop.

I thought it was root rot, but I have cut back on flood level to make sure the medium is drying out. -
-ph is 5.6-6.0.
-using h2o2
-temp 71-82F

This setup has produced well several times before the last 2 runs. rockwool cubes, ebb flow. GH 1200 ppm.

I have flushed twice. no improvement.

I am about to snap.

Click to expand...

Hey zz..... back up for one second..... It sounds like you are doing most everything right to diagnose your problem except one thing i can add...
I used to use cubes as my medium and had the exact same prob.
you still need a fan for proper air flow but the cubes will stay wet for far longer than you think.... it might take 2 or 3 days to dry back out depending on temps & humidity ... are you wating long enough between waterings...
I know when things start going bad you can panic and try something else thinking your fixing the prob. when your actually adding to it .
you only need h202 every 3 to 4 days depending on your rezs needs.
I converted to perlite with a small amount of rock flock in the bottom of the pot to keep the perlite in.... no more root rot, over wattering etc.
1200 ppm is just fine if your using quality nutes.. i run 1800 ppm
Hope this helps a little ..... toasty

i waited 48 hours and they were still damp. Once the problem starts, they use less water, making them stay more wet, escalating the problem.

prob gonna wait another 48 to flood again. When they are healthy, the dry out much faster. I normally flood once per 24 hours.

I even lifted one plant up to peep at the roots, and the very bottom inch or so looked great. but the original cluster of roots just below the base of the stem were very dingy looking.

I think I am gonna cut down on my container size. Maybe mix in some perlite, or rock flock. Hey Toast master, what kind of perlite do you use? or rock flock?

ZZ.... rockwool is notorius for holding h20.... verry easy to over water.. then rot sets in... it sounds like your devloping the rot ,if you are using h2o2 switch to 35 % hortaculture grade 1.5 to 2 mill per litre to give the rot a jolt.. 1 time only then watch .....
to be specific.. i use an 8 " pot , i cut a circle out of landscape frabic, the kind from the home depot, i put a hand full of rock flock on top of that,(just the furry cotton like flock on top of that), and fill with the standard perlie... water twice a day.. 12hrs. apart.. works oh so well....