Building single-plant growbox, I want your opinions!

Another good suggestion. So, it doesn't mess with their heads too much to reveg? I don't really know anything about that, it just seems a little unnatural for the plant. Like everyone is always telling me not to interrupt the 12h dark cycle ever, no lights or shit because it will make hermies. So if it's expecting another 12 hour darkness and the lights just stay on (or come on earlier), it won't screw it up? This is just a thought I had lol, this is not based on any factual information, I just connected the dots haha.

ive never reveged myself, just read about it on this site, so i can only connect dots myself

Hmm. Yeah I've heard of it before too. I may look into it. First I'm gonna give it another day or two before I cut the cord on this one. Just to be sure If there's one mistake that trumps all the newbie mistakes it would be throwing out a female plant haha.

ya that would be the worst

so why do 12/12 from seed? im pretty sure that all seeds need to go thru a veg stage no matter how much light they are getting. once they are sexually matured is when you see preflowers in plants in veg. if you do straight 12/12 the plant will still grow for a month or so until it reachs maturity and then will flower.

littlegrower2004 said:

so why do 12/12 from seed? im pretty sure that all seeds need to go thru a veg stage no matter how much light they are getting. once they are sexually matured is when you see preflowers in plants in veg. if you do straight 12/12 the plant will still grow for a month or so until it reachs maturity and then will flower.

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12/12 from seed lets you show sex in about four weeks time from my recent experience. Most people veg a month then take an additional two to three weeks to determine sex after flipping the lights. This way you cull the males early and only devote time and energy to plants that will yield some smoke. Your plants are not really mature enough at this point ot hazard a pollination since males usually show first and are usually the fastest growers and frequently turn out to be the plant you thought most vigorous and were hoping was a girl. So the males get tossed before the girls show...and you move the girls back to veg and fill out a couple weeks. Then when you flip the lights back 12/12....they practically jump into flower immediately.

During the veg time you pot up only plants you know you want to flower instead of all of them needlessly. Of course if you are hydro...different game but even more important....why veg anything you are paying for expensive nutes to grow in and then throw it out.
Soil is cheap by comparison as are most organic solutions.

I chose to go 19/5 for my entire veg and my plant is less than a month old, switched to 12/12 a few days ago and it's showing preflowers. It didn't take long enough for me to get to this stage for me to worry about early sexing. And my soil was cheap as hell haha. I can see how this method would benefit a lot of people but I probably won't worry about it. I'll just grow 4 plants from seed under 18/6 or 19/5 again and then toss whatever males I end up with when I flower.

your still gonna want to flower early, just imagine 4 bushes like this one in your little box

yeah shit good point. The most I could fit in there is 2 if they get like this one. Maybe I'll do 2 but keep a few seedlings growing in another location so I can transplant them in if both of mine end up males. And if I get 1 or 2 females I'll make sure they fill the box lol.

Old Coot said:

12/12 from seed lets you show sex in about four weeks time from my recent experience. Most people veg a month then take an additional two to three weeks to determine sex after flipping the lights. This way you cull the males early and only devote time and energy to plants that will yield some smoke. Your plants are not really mature enough at this point ot hazard a pollination since males usually show first and are usually the fastest growers and frequently turn out to be the plant you thought most vigorous and were hoping was a girl. So the males get tossed before the girls show...and you move the girls back to veg and fill out a couple weeks. Then when you flip the lights back 12/12....they practically jump into flower immediately.

During the veg time you pot up only plants you know you want to flower instead of all of them needlessly. Of course if you are hydro...different game but even more important....why veg anything you are paying for expensive nutes to grow in and then throw it out.
Soil is cheap by comparison as are most organic solutions.

Click to expand...

ok i just said that they take a month(four weeks) to show sex. if you veg most any strain for about a month mayb a week before or after then you will c preflowers. that means the sex is already determined and this will happen either in 12/12 or 18/6 or 24/0. when ppl then switch over from veg to flower it does not take 2 weeks for the sex to be determined if the plants already have preflowers. which has to happen to any mj plants before they can flower. sexual maturity!

fractus- i say if you want 3 to 4 females at once all being small plants to fit in your box then you need to find a fem then clone her and start all new fresh fem clones in your box which can b flowered straight from being rooted. other wise if you have multiple plants in there growing to sexual maturity your gona see alot worse results and smaller less healthy plants. yours is doing so well now cause of its room that it has to grow and all of the available light is going to that single plant. adding more will take away from the others and make each plant less gerthy and vigourous. unless you plan on adding more light..

That's a good point. I'm thinking about rearranging my bulb configuration soon actually, And this plant is growing healthy with all of it's space. But the box is a perfect 2:1 rectangle. So my round bushy plant can only use half of it unless it wants to get wider it one direction than the other. So far it's showing that it isn't growing out anymore, its just keeping its width and bushiness, and getting taller and fuller without spreading wider. So this leads me to believe that I can comfotably divide the box in half to make two square compartments and have a plant in each - I'm probably going to add another bulb or two, I have a design in my head, I'm just hesitating to make a final verdict on my current plant.

dang...that turned out real nice. could i do this same thing just using some cardboard boxes instead of the styrofoam coolers??

Cardboard is pretty a little riskier than styrofoam, for a few reasons really. It will light on fire quicker if you get it too hot, and you get less structural support. My styrofoam seems to hold together very well. Plus it's not waterproof lol. I wouldn't go there if I were you. I'm actually redesigning as we speak. I chopped down my old plant, its' 100% male. I rearranged my lights, got some fresh soil and perlite and divided in half, about to transplant a couple seedlings into it now and get them started. Hoping for a female this time. By the way you guys wouldn't believe the root system my plant had. I lifted up the entire stryofoam box, dirt and all, holding it by the stem of the plant alone. It supported all of the weight just with the roots. I was impressed.

nice...but that SUX that it turnd out Male....all that time...

Ok so here is what I just finished doing.

Remodelled carbon filter, the other one was too high maintenance and kept falling apart because it was 50% duct tape lol.

New light configuration. This may create too much heat so I'm watching the temperature right now to see how high it goes. Probably going to take a couple bulbs out, purely experimental.

New seedlings I had in another pot just getting window sunlight. Same strain/seeds as the last one. Hope they go crazy

lookin forward to seeing 2 girls.

def enough light. looks like a mixed spectrum

unless the cooler contributes, the cooler suouldnt get too hot

You called it. three 6500k, two 3000k, two 3500k. It's getting to warm though, just broke 35 celcius I'm not gonna let it go any higher so I swapped over to just 4 bulbs. Kept my 6500s and left a 3500 as well. My fan isn't powerful enough to cool that many bulbs. I had that feeling before i tried it.

celsius? what are you english! oh just read your location, didnt know you were canadian....
whats that Fahrenheit?

4 6500k should be good. swap em out for the lower "k", maybe 1 6500k, in flowering

Yeah for sure. And yup, Canadian and proud haha. And your answer is 35 divided by 5 multiplied by 9 plus 32 = 95.. So way too damn hot. Lol.