Nutrient Burn or Defeciency?

[stinkyattic]

what WHAAAAAT!
Well there's your problem... your plant can't use the nutes, water, or light because atmospheric CO2 is the limiting factor. They are suffocating, and that contributes to the curly leaves.
Very important concept in science, particularly as it applies to chemical reactions, which is what photosynthesis is. You run out of CO2, the reaction CEASES. This means your plant stops growing entirely.
REad up:

Limiting reagent - Wikipedia, the free encyclopedia

[Ryder77]

What would be the easier way to add CO2 without an expensive CO2 generator? Basically the plant is in an unfinished space in the basement which is just the foundation for the whole house and there is an access hatch in my apartment. The only thing I have down there is the plant, 2 150w HPS lights and an oscillating fan blowing on the plant.

[stinkyattic]

Easier? Add a proper exhaust exchanging stale growroom air with CO2-rich air from inside your apartment.
Is the pot right on the floor? basement floors are cold. As stated earlier... cold roots, unhappy plants.

[Ryder77]

The plant isn't right on the ground, it's about 6 inches off the ground. Also, because of where it is, it's all concrete so there's no easy way to install an exhaust system.

[stinkyattic]

Then you have to choose:
-Install an exhaust system at great hassle to yourself and your foundation
-Find a new grow location

Climate control is NOT optional. You have it and grow a garden, or you don't and your plants die a slow and painful death... They're your plants...

[LuciferN]

Don't you have a dryer in you're basement ? If yes you can always use this hole as an exhaust for you're ventillation system.

[Rusty Trichome]

Miracle Grow is not the best, but not the worst, either. (at least for vegging)

If you get the growing conditions under control, you'll also nee to work on learning the nutrient end of growing cannabis...

I'd ease-up on the 1/2 strength Miracle Grow 24-8-16. That's way too much for an every other day feeding schedule. You may only be applying 250 ml, but all of those nutes sit in the top couple of inches of the pot, 'burning' the surface roots.

I used MG for years. 1/4 strength twice a week, and that's still a bit 'hot'. Are you at least adding freshly ph'd plain water between feedings? Expect to flush once a month or every 6 weeks to remove the salt build-up, or nutrient lock-out could eventually be fatal.

As with any nutrient or additive, you should always "sneak-up" on the upper limits, not start out there. :thumbsup:

[Ryder77]

Here's the update...my PH strips go from 6.2-8.8...I added the Optimum Hydroponix Ph+ to bring the Ph of the solution above 8.8 (hard to tell cause of the color range) but the run off is still not registering, cause the lowest mark (color) is 6.2. Should I add more Ph+? Also, in the crawl space, I did notice the exhaust from the neighbors dryer which leads outside, which I have tapped into with a bathroom fan and a T-pipe. What else can I do to bring this baby back to life? Or should I just start over with the 6 clippings that I managed to take from her before re-potting?

[Rusty Trichome]

You are raising your ph to 8.8 before adding to plants? This will likely either kill the ladies, or stress them into producing nanners. 6.6 to 6.8 is optimum in soil, and Promix shouldn't alter the ph 'up' at all.

What color is your run-off? Pool test strips or an aquarium water ph test kit is fine for clean/clear water. But the color of the run-offf water will skew the results. A ph pen is a much more accurate method.

I strongly recommend adjusting water to around 6.6 or 6.7, and flush the shit out of em. (a couple of times the volume of the pot, minimum) For the time being, I"d pay more attention to what the ph is going in. Worry about run-off if the need arises, and get a ph pen if possible. (the need will definatelly arise at some point down the line)

Also...are you sure you're not pumping your exhaust into your neighbors bathroom? (their fan likely isn't on all the time to push your exhaust away. I'm positive that if my bathroom started smelling like a skunk, or if I started hearing voices or noises coming from the vent/fan...I'd definatelly track down the problem, or have management do so. :wtf: