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If you want to improve yield on the lower parts of the plants, then you should space them further apart. This will allow more light to reach lower branches. I imagine they are pretty crowded in right now, and negligible amounts of light will penetrate below your canopy. I would definitely LST in...

Your partner is wrong. 600w lamps have a greater light output than fluorescent bulbs. I dont know why he would want to use only flouros. Maybe he's living in the stone age :). You'll be happy picking up an Ushio, Hortilux, or Lumatek's 600w bulbs. There are alot of tricks to get the best out...

I have an infrared temp gauge I use in my grow room, and it doesn't take very long for leaf temperatures to drop after lights out. Ill gladly check it for you tonight and post results.

Botanicares Cal/Mag + is what I would suggest, and its what I use. For a PH testing, pick up a Hanna economy meter from http://www.eseasongear.com/ if money is tight. For less than $30 you can have a good reliable meter. Although the cheaper models can take a few minutes to give you the final...

Even though I haven't seen any scientific papers showing the effects on Cannabis, I still wouldn't disregard the effects it could have. Stretch is our enemy, and Ill do everything I can to reduce it. Even if it had little to no effect, having a higher ADT(average daily temperature) by keeping...

Allforit, is this your first plant? Im sorry to be the bearer of bad news, but your plant is so far gone she is going to struggle to the finish line. You've had a severe macronutrient deficiency if not multiple ones going on for awhile it appears. Im glad you're phing your water now, but it may...

You have that completely wrong. A large night time temperature drop does not reduce inter-nodal elongation. Here is a link that explains DIF. As for stimulating flowering, that is true with Orchids, but Ive never heard of it mentioned for Marijuana.

I dont believe it is as poor as you think. It is a commonly accepted way to measure soil PH by many Universities Horticultural Departments. This excerpt is from NCSU: Tipping the container 30 to 60 minutes after irrigation of containers provides a true reading of EC and pH levels in the...

I dont know the Guaranteed Analysis of FF BB off hand, but Im not quite sure it has enough Ammoniacal Nitrogen in it to keep soil PH low. Their Grow Big is about 50/50 A-N, and N-N, which will still drive PH down as A-N has a greater effect on soil PH than N-N. I wouldn't increase your...

Your soil PH wont stay at 6.4 after only one PH'd watering. Your water source, and nutrient source will affect your soils PH. If you have alkaline water, it will drive your soils PH up, and you will want to continue to PH your water to low 6's to counteract this. If you use Reverse Osmosis...

Your best bet would be to transplant into a larger container with soil that is the right PH. Ive done this once before and it worked quite well. Using PH down at this point wont work. Ive done tried that. You should look at what is causing your soils PH to rise to such drastic levels. Have you...

You shouldn't let your temps drop into the 60's. Lower temperatures will prolong flowering. Having a higher ADT(average daily temperature) will speed up flowering. A large difference in day and night temps will also lead to greater internodal distance. Keeping the difference at 10 degrees or...

Locate your four most developed lateral branches, and top above them. The few times I have done this resulted in 4 colas.

Its not from flowering, and Its not Big Bloom. Have you added any other nutrients lately? I can't be of much help. Sorry. You may want to look in the Marijuana Plant Problem forum, and see if there are any threads regarding the same problem. Im sure there are.

Its not rocket science people. Top above the 3 bladed leaves and you're done.

Its hard to tell without using a pocket scope to examine trichome heads. Cloudy heads have the greatest concentration of THC, so Id suggest buying the scope from Radio Shack and examining your plants. Only costs $13.

Have you noticed a extra girth in the trunks and branches? I had been using only Azomite to supply silicon, and it works great at 2.5 tbls/gallon. Its lead to the thickest trunks and branches of any plants I have ever grown. Ive started to use Pro-tekt as well now, and hoping to see even greater...

Its been fun following along Riddleme. Congrats on the many successful harvests you had in here. Im not surprised the defoliated plants didn't turn out well. The whole crux of that defoliation thread is to create short compact plants by defoliation in veg and then reap the 'rewards' in flower...

Stickystink, raise the temperature of your growing space when lights are off. Raising the temps will reduce internodal elongation, as well as improve their growth rates, and will decrease the time it takes to flower. Get it up to 70 during lights off would be good. Even 75 is fine. If your...

I would just make the jump to DG. AN's product line is designed to empty your wallet, and bank account. And like you said, they have so many products, when things go wrong with your plants, its even more difficult to learn where the problem originated. I just started to use some Dyna-Gro...