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Strains that were developed in mountainous regions (Afghani, Swiss, Kush) would maybe be more resistant to cold, and more sativa-ish plants, like Thai, African, etc. may resist higher temperatures better. Just an 'educated' guess.

Overfeeding can cause multiple issues (fucks up PH which can cause deficiencies)... biggest mistake first timers make.

International Cannagraphic Magazine Forums (seems like a decent forum with intelligent people).

Basically the air in the room should be exchanged every 5 minutes. So 2 x 2.5 x 8 = 40 cubic feet. You want all the air in the room to be exchanged after 5 minutes, so you would divide 40/5 and you get 8. So 8 CFM would be optimal for your closet. I don't know of any issues having too much...

Things to know about lighting... https://www.rollitup.org/view.php?pg=faq&cmd=article&id=259 "The minimum amount of light required by marijuana plants is around 3000 lumens per square foot. However, it's not 100% accurate, since although you may have a 10,000 lumen light, the amount of light...

Another reference for light coverage... https://www.rollitup.org/view.php?pg=faq&cmd=article&id=59

So I have a 430w and a 600w, producing around 150,000 lumens. My canopy is roughtly 4x6 feet (=24 feet), so divide 150,000 / 24 = 6,250. Is this correct? So by this calculation I'm just in the optimum range at one foot away... so at two feet away I wouldn't be able to grow optimally? By the...

So you were thinking in lumens per square foot! Simple misunderstanding. The box my bulb came in and my Jorges Cervantes Marijuana Bible talks about total lumens. Understanding how many lumens are produced at different distances from the bulb allows me to position my plants and helps me know...

Maybe you should concern yourself with picking the best breeders, then figure out which of their strains you want. Is price much of a concern? What are some of your criterion?

Great question that's asked a million times... I think it can be broken down into different categories. You have Sativa, Indica, Sativa/Indica (mix) and Autoflowers, so you could pick your four out of these categories, or... you could choose by region... Afghani, Thai, African, Hawaiian...

But it is "photo-sensitive" right? not "dark-sensitive"? :) seriously though... where the hell did you hear this about plants creating hormones in the dark?

I'm glad you saw my second post... could you still elaborate on the lumens per square foot thing... I don't understand how that's suppose to work.

I wasn't talking about lumens per foot. Well what does 5000 lumens per foot even mean? At what distance should you be getting this 5000 lumens per foot? I'm sure you do realize the lumens drop the further away you move from the light. I don't care about the lumens hitting the ground, I want to...

Yes, Auto's are half Runderalis... I'm the same way, keep it simple stupid... but we're just shooting the shit, talking theory.

This guy has the right idea about how lumens work! What he is saying is that every 6 inches further from the light you get, you lose half the lumens (or for every foot you move away the lumes drop to a quarter of the strength... So a 1000w light that puts out... 160,000 Lumens at 1 foot 40,000...

No, I read in Jorges Cervantes Marijuana Bible that 10,000 lumens is the MINIMUM for optimal growth in the flowering stage (maybe you're thinking about the vegetative stage?) Did you know a 1000w puts out over 160,000 lumens? I don't mean to get into a thing about this... just google it...

Straight in the soil also saves you a step, where you don't have to transfer the seedling to the soil, where you can possible damage or contaminate it. Why go through the extra work? 1. Put seed in soil. 2. Water. 3. Wait. I've had lots of plant problems, by germinating was never one of them.

7000 lumens is low... the idea is to have a minimum of 10,000 lumens for optimal growing. Maybe you meant 70,000? Also, the better the air flow the closer you can get you plants to the light. When I had my 400w light I got it to almost 6", but then again I didn't have a very good reflector.

I've read that they can be kept for up to 10 years, if kept in a cool dry place, but the longer you keep them the lower the germination rate will be. I don't think 2 year old seeds should have too much problems, as long as they were stored properly. Also, the best way to germinate is straight...

I'm inclined to believe you if there weren't people who said they did it. " The hormone that causes flowering is built in dark and to get to suficient levels, it NEEDS 12 hours of dark." ... I found this interesting... never heard that before... where did YOU hear this? Have you heard of...