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    preflowers

    Not sure I'm getting the exact question, but preflowers show up with time before any light schedule change. You don't need to go to 12/12 for them to appear. Nothing to worry about ... except early disappointment if you see males.
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    F*&^kin Fungus Gnats

    I tried the mosquito dunks (which have BTi in them) and that did seem to help. If you can find some Gnatrol (also has BTi ... some hydro shops have it or something similar) that worked better for me, but maybe because it was easier to get a correct dose. I doubled their recommended...
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    preflowers

    Thanks, I was afraid of that. But hope springs eternal you know. I take it that the white hairs appear on the female preflowers immediately, so if I've had the little nubs for 2-3 days without any white hairs then those plants are for sure males. I need to get rid of them for space reasons as...
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    preflowers

    Thanks for the photos. Do the male and female preflowers look identical initially, with the female preflower eventually sprouting the pair of pistils and becoming more oval? Or is there some noticable difference from the beginning? I have three plants all the same age, and one showed clear...
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    Ten Myths of Growing Under Lights

    Good post ... just a couple of minor comments to add in two sections. 1. HID lamps give off more heat. All lamps of the same wattage give off more or less the same amount of heat. A 400W metal halide or HPS lamp gives off the same heat as ten 40W fluorescent tubes or four 100W incandescents...
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    2700K Question...

    ownage al is on the money. The higher the Kelvin number the shorter the wavelength of the light source's peak intensity (on a Plank curve). Since blue-green wavelengths (shorter) are best for veg and orange-red wavelengths (longer) are best for flowering, you want a higher Kelvin number...
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    Bugs in the soil

    Heating the soil (180-190F) certainly works if you have the time and oven for it and can stink up the house for a while. BTi is available in some form at most hydroponics stores or local garden centers (sold as mosquito larvae killer). Just ask them for it, or order Gnatrol from a web site...
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    5 Gallon pots??

    It's right. A 6.14" per side cube (cube root of 231) holds a gallon, so a 12" per side cube would hold about 8 times as much (2^3). Grab one of those plastic one gallon water jugs from the supermarket and it measures roughly 6" x 6" x 7". For the original poster, you could grow a monster...
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    5 Gallon pots??

    One US gallon is 0.133681 cubic feet = 231 cubic inches. Your pot is 1.125' diameter (radius is half that, or 0.5625') and 1.208' tall. The volume of a cylinder is pi (3.141592) times the radius squared, times the height. So your pot volume is pi * (0.5625^2) * 1.208 = 1.201 cubic feet. This...
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    Bugs in the soil

    Fungus gnats. The larvae will munch on your roots if you don't kill them, and they'll make more adults of course. Gnatrol, or anything with BTi in it, will kill them but you have to drench the soil a time or two with a strong mix I just fought a battle with these things a couple weeks ago. No...
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    what is the right soil mix???

    Yeah ... watch out for the fungus gnats in any commercial soil. I've found them in both Schultz Pro potting mix and Sta-Green container mix. Apparently the eggs lay dormant, then a week or two after you get going with the seedlings, watering, etc. the little bastards are everywhere. If you...
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    Bugs = Issue HELP PLEASE!

    Definitely agree with that. Fungas gnats are only about 2 mm long and have long legs relative to their size (ie. they look like a "normal" gnat). They also like to craw around and dig in the soil (to lay eggs underneath) rather than munching on the leaves. If you run your fingers along the...
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    Bugs = Issue HELP PLEASE!

    Sounds like fungus gnats. I had these guys going after my new White Widows and you have to do two things to get rid of them. First, get some pyrethrum and mix it up in a spray bottle, and spray it all over the top of the soil. This will kill the adults. Then get some BT israelensis (BTi)...
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    Want to see pictures of 3 week-old plants

    Here are mine ... celebrating their 21st day (today) since first sprouting. It's my first grow so I don't know how they compare to what is "normal." These are White Widow from seeds. -Snake
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    how much will 1000w light jump my electric bill

    On U.S. power at about 10 cents per kilowatt hour (max, you may be less), you'll pay a dime per hour for this light. So running an 18/6 cycle for 30 days would be 540 hours a month, or $54/month. Just multiply your kilowatt/hr rate by the number of hours per month you run it since you have a 1...
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    What does white widow yeild? please read/help!!!

    I see why it is called sea of green! Looks great. I have to start flowering on May 7th no matter what (long story ... visitors, etc.) so I'm hoping mine will be OK by then to cut the light period backl. They are really starting to grow now, and I still need just a little luck for one female...
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    What does white widow yeild? please read/help!!!

    Thanks, and I'd love to see the photo. I got 4 out of 5 of my seeds to germinate, but one sprout stopped growing with about 1/2 a cotyledon leaf out so I killed it. That left 3 plants, and I'm hoping my 87.5% probability of one of them being female at least works out in my favor. How long did...
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    What does white widow yeild? please read/help!!!

    Ativas ... how long do you let your WW grow before starting flowering? I have three plants 15 days old today and they look about a week behind yours (one is growing faster than the other two). But I'd be curious how long you typically let them veg before flowering if you prefer more smaller...
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    400w(hps)&400w(CFLS) What uses more NRG

    For light bulbs the power that is specified is how much power it uses from the wall plug, not how much light is emitted from the bulb. So a 400W hps uses the same amount of power from the wall plug as 400W of CFLs (any other kind of bulb, or combination of bulbs, that total 400W). Efficiency...
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    Slow Growth / thin stems- HELP PLZ

    I had a similar problem and got advice here to replant in soil with no nutes (I was using a potting mix with nutes), and bury the plants up to the cotyledons. I did this and flushed the container with distilled water, and got the light level right, and the little guys have recovered and are...
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