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Yes, you can get neem oil at any decent garden center. And yes the buds, if it pulls through, should be unaffected by leaf spot blight.. Again, the plant might just pull out of this, but the neem doesn't hurt anything. VM

That's correct, you will need a light source as well. i have just used fluoros in the past, turn them on before sunrise in order to maintain 12+ or so hours of light per day. They don't have to be fully rated grow lights, just enough light to prevent start of flowering cycle. PG

This is a tough call. However, since the affected plants are clones taken from the same mother plant, and I assume that you are using the same watering, light and fertilizer regimen on all of the clones, then some of the obvious causes can be ruled out. In order of first guesses, I would rule...

PVC pipe will be damaged by UV, 3-5 years, less so by low temps. You will need to paint it. But in general, the tensile strength of PVC is pretty low. I would recommend using galvanized fencing pipe. Still, when all is said and done, a kit is probably te best way to go. then you have the right...

Well, a few simple things, first, will it be free-standing or lean-to? Also, do you have a good south-facing view? How much space do you need? It really is a matter of need, size and quality. If you are planning on anything larger than say, a 6 ft x 8 ft, I would go with a decent greenhouse...

Looks like a mild case of Mg deficiency. VM

There's not much science here, you just need to totally block the sunlight, early morning, or late afternoon so that you get 12+ hours of dark. You can trigger this photo response in a matter of days, 3-7 depending upon the strain. But the real question is the mechanics, the best way to do this...

I'm with leafminer....it is in a good flush of growth. Just let it do its thing. I can't think of any good reason to top it.

Without seeing photos, I am guessing that you are just seeing normal leaf senescence, the lower leaves just give up as they get shaded by the upper growth. Probably not an N deficiency, that would show up in new growth. Post a pic..

You data is near perfect for a hydro grow....IMHO. I was thinking that the slight chlorosis in the leaves, the faded green blotches, might be due to some micronutrient deficiency, like manganese. But after checking the technaflora website, you are covered for micronutrients. You might try...

So many choices, hard to say. What's the temp in the grow room? How far from the light, and what type of light? How often they getting nutes and what type.? Could be heat, a P deficiency, flakey Ph in soil/water. Sorry, more info needed.

I suggest that you get some blackout curtain material and line your closet with this stuff. It is relatively cheap and easy to find. here is a source: hXXp://www.farmtek.com/farm/supplies/ProductDisplay?catalogId=10052&storeId=10001&langId=-1&division=FarmTek&productId=90308 You could put the...

Well, if it is a true autoflowering strain, a rudellis cross, then you have very little time. The green pendulous pre-flowers should turn white in a day or two and open another day or two after that. All things considered, you have around a week....I'm guessing. If you are so inclined, and have...

Well, never one to flaunt the ego,...I sit corrected. Thanks Hick, very nice bud shots btw. I was stating from memory, seemed liked flowering just sort of limped along until the long nights set in. But I could certainly be wrong about that, hell, I don't remember what I had for breakfast...

Well, I must admit that this is news to me too. All these years I understood that it was the phytochrome pigment as the primary agent of flowering trigger in cannabis. In the case of cannabis, there are other factors that can affect, typically delay, the onset of the photoperiod response. These...

Some good info here. But nobody has mentioned that good bubblehash is a function of the plant genetics, the gentle handling of the plant material during production, and the proper mesh-size screens. Now on this latter point I have been in a few debates over the years. But a range of screens...

Okay, well, 40 degrees north puts you at about Philly. So you will have a growing season roughly from mid-April to Halloween; that's over six months. If you are going to grow outdoors, I suggest that you have a very small indoor setup to get the seeds going a month or two before the danger of...

Yes, good advice posted here. If you are not all that taken away by the esthetics of single large buds, break them down a bit for drying. This will help to get air to the inside of those larger buds. The buds are dry enough when they are just starting to feel a bit crispy. the stems should...

You are absolutely right, they do go to the top where the more tasty tender leaves are found. What an insightful solution, just let them run to the top by hanging upside down. Now why didn't I think of that? Great post! VF

Sounds like the common red spider mite. You can control them chemically, but you wouldn't really want any of the commercial miticides in your grow room or on your flowering buds. Organic controls, like insecticidal soaps work so so from my experience. I have had only 3 or 4 infestations over the...