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check the runoff or get a soil pH meter. you can start now. go with 1/2 recommended amount at first to see how your plant reacts

not complicated at all - you've got it right

as long you're growing in that space the 250 can handle as many plants as you can squeeze in. it's the square footage that matters, not the plants.

good design, just a couple of thoughts: - you probably can't modify your current hood to be air cooled because in addition to the holes you need a glass cover for the bottom. - splitters in a ducting system are hard to make work because the air will flow through the side with the least...

zinc and/or nitrogen deficiency. check to make sure your pH is ok.

you have a sativa dominant strain and its just doing what it does naturally. look up lst for a way to train the plant to stay shorter.

a couple of ideas: you'll get a lot of people saying use as much light as possible but there really is overkill and you've reached it with a 400 watt light in that small a space. if you haven't bought it already, i'd go with a 250 watt hps and it will produce as much light per square ft as the...

you're risking turning the plants into hermaphrodites by messing with the light cycle, but nothing you can do now except to eliminate any additional changes except for the change to flowering.

males are useless. chop it down.

you are going to need a different solution when it comes time to flower. you have to keep light from getting in during the 12 hour dark cycle.

if you are serious about wanting something to smoke from that plant you need to get a different light. you might get one joint if you keep going as is. the kind of light you want is called cfl (compact flourescent light) - its the kind with the curly bulb. if you're stuck with the one light...

i use http://www.amsterdammarijuanaseeds.com/ and have never had a problem

as everyone has said, read first and then you'll be ready to ask specific questions that we can answer. read the faq section and the stickies in each forum and you'll have most of your questions answered.

sounds like a male and if so you are truly screwed.

you may already know this from your reading but you need to completely separate the flowering and vegging areas because they will be on different light cycles. for the flowering area you want to use an hps light - 600 watts meets the specs for indoor lighting (6,000 lumens) but you could use...

a couple of days usually. not going to sprout if they haven't after one week.

there are lots of variables that effect the answer to your questions, the primary one being what strain(s) are you planning on growing. but to give you a general answer, count on each plant taking up 2 to 3 square feet of floor space and then add space for equipment and access. your watering...

you have plenty of room for a 1000 watt light and the cooltube and inline fan will cool your room considerably. you can get the plants within 6" of the cooltube. you need to think about where you are venting this air and if detection is a risk you'll want to include a carbon filter and these...

its not something you'd want to do every week but a one time change over is not going to hurt the plant.

looks pretty good but a couple of thoughts. - you want to keep the lights within a couple of inches of the plant - looks like you could transplant to a bigger pot. you want 1 gal per foot of plant when fully grown.