Hello,

My plants stopped growing a few weeks ago. I have 4 plants, all started from clones. They grew fine and very fast and looked so healthy I couldn't have been happier, at first (for about 1 month). They reached about 2 feet tall, and then all the sudden the leaves started to turn yellow, crisp, with brownish red spots on them, and the plants just quit growing.

Here's my specs:
Hydroponic.
white rhino strain.
nutes are general hydroponics micro flora 5-0-1.
I use 8ml / gal of nutes in an 18 gallon bucket, but only fill it with 12 gallons of water (12 gallons of water, so 96ml of nutes used).
PH between 5.3 and 5.9
running three 400w HPS lights, 24/7.
heat is 72 degrees at night 82 degrees during day.
humidity is normal, never high.
fresh air is pumped in from outside my home.
oxygen is delivered to my roots via a simple fish pump system, and I'm sure they are getting good amount of oxygen to the roots.

Additional information:
I was told to use the solution of nutes I mentioned above, and as the plants drank about 1 gallon of solution, add 1 gallon of fresh water until 12 gallons of fresh water were added, and then start a new FRESH batch of nutes. repeat process.

I never got this far. WHen they were young and first growing, they only drank about 2 gallons of water. then they stopped growing and hardly taking much water/nute solution at all. I thought there was a nute / PH problem, so I gave them a fresh batch of nutes.

this is when I noticed my PH meter was out of calibration, and reading 1 point high, so a reading of 7.0 was really 8.0. I fixed this. Now, i figured I screwed all batches of nutes up, and gave them another new batch, and adjusted PH to 5.3. Still no growth.

So I read the forums here and thought I had NUTE BURN (3 batches of full strength nutes within a 2 weeks). So, I've been flushing my plants for over 3 days now with nothing but water, no nutes, and have still seen no change, though in the 3 days they have drank over a gallon of water.

I just went through the forums again, an believe I may have OVER FERTILIZED my plants. Maybe I shouldn't have given them a full strength batch of nutes while so young??? Can this stop plants from growing???

or:
I'm now wondering if maybe I did't have nute burn, but nutrient lock out. Since my PH meter was reading off, i may have been locking out all nutrients.

I just don't know. I don't understand how they can just STOP growing. I'm at my wits end here and afraid my babies are going to die. I'm going to take clones today for just in case, but am not even sure they will live since the plants are so stressed...

Any and all help will be appreciated.

Sorry so long winded but I wanted to give a clear picture of what is happening here.

Thank you for reading,
-Snut

Get some pics up if you can. Are you using the entire GH 3 part system or just flora micro? You may need some P and K.

__________________
343 You are not forgotten