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Shit.... I'm really grateful for the replies but I'm so pissed off right now. Why? Because I actually have a bad ass setup (2m high tent, 1000W lamp, hydro). The fucking dicks I bought it from have been messing around all month (literally just got the last of the order today, a month later)...

I think the stretching is a big part of the Sativa dominance. I didn't want to deal with massively tall plants (which these can be) but didn't want the couch lock of Indica, so figured I'd put up with it and went all Sativa :D Supposedly a brutal THC content in the resin - we'll wait and see...

Strain is Hawaiian Snow from Greenhouse Seeds - supposed a Sativa dominant. The finished plants they grew were very spindly and open with not a huge amount of leaf cover. Those wire loops are to keep them upright - at first, they were all over the place, they all fell over horizontally they were...

Yep, UV is very picky about what it will and won't go through - so it's best not to put anything in front of it. Specialized scientific UV lamps that costs hundred or thousands of dollars still have serious limits set on them just by the glass they're made out of. There's a band between UV and...

Sunbeds as well

I'd almost certainly say it's heat. When you use your thermometer to measure the temperature, you're measuring the air temperature, which is set by convection and warming of the air. That kind of burning is more to do with radiation. The leaf is green and designed to soak up light, but if you...

I had exactly the same veriation one day when I left the fan off and the 600w light baked the plants

I don't want to be a dick man, but are those leaves not burnt?

The none UVB lamps emit a tiny amount, they generate it and it's used to optically pump the phosphor coating on the bulb into emitting visible light. The second part about the number required to emulate the sun is only true in terms of visible light. Fluorescents can easily release similar...

I was going to say, mercury vapors can pour out UVB. I think it's going to be important to avoid going for one bright bulb and instead use lots of low powers. Same way that if you use one massive HPS in the center of your grow, the outside facing areas of the plants don't get the same light...

You're thinking of Lysergic acid / LS Amide and other ergolines that are made by the fungus ergot. LSD doesn't occur naturally, the last stage of going from lysergic acid to lysergic acid diethylamide requires a nasty reaction the fungus doesn't bother with. Two methods of doing it are with...

I can seriously relate to your time growing up and what your thoughts were. I'm happy you've found someone to be with. I think that's an overly negative attitude to have about it, they fall into that category in a lot of places (not just the US) because a lot of them don't look like they care...

http://www.biology-online.org/biology-forum/about10736.html Plants either osmotically absorb things or actively pump them using transporters - the second is more important if the thing being transported is already at a higher concentration in the cells than it is outside (since nothing goes...

I'm kind of new here, so excuse me you've already got this idea. Here is the most basic Hoselock automatic timer (~$50-60 / 30 UKP); Here's the pro digital version (~$80-90 / 46 UKP); Okay, go to the dump, rip the top off a washing machine and look for where the hoses come in at...

Girls will be looking at their guys and assessing them in terms of whether or not they'd want to marry them - they subconsciously, continually check if they're suitable as fathers. If you're also doing a 5 plant or more grow, that'll cast doubt in their minds if that's all you go on about. I...

Medium is too dense? And / or watering too frequently? Watering from above has a tendency to pack media down, which is why gardeners always suggest standing plants in pots and using capillary watering. Which also encourages the roots to chase through the soil.

Agree with the others In a room that size, a 600w would get too hot and maybe even a 400w. 1kw is fk'ing huge. Without a cool tube it's going to get roasting hot in there (possibly fire hot) and the radiant heat is going to burn the leaves. I once did something similar with a 600w that was...

That's his journal entry from a few days before when he absorbed some unknown amount through an unknown pathway - not when he'd taken 250 ug.

Depends on your light wattage and the size of the room / tent / box, but almost certainly no you won't need anything more. 250 cfm will create a perfect draft through a 1x1x2m tent sized space and the air will whistle past your hand when you put it over the cool tube inlet