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once your seedlings break the surface of your growing medium use the fluorescent lights as these operate with a much lower temp than the hps and they won't burn your youngins as easily. once they start getting a couple of node on them switch over to the hps and you can use the fluorescent lights...

i've heard very good things about attitude

1) there is no real minimum. most usually wait until you get at least a couple of nodes worth of growth. probably at least around 2-3 weeks. 2) most people usually don't top during flowering just because there won't be much time for the growth of the plant into 2 colas. i would do it at least a...

i would let them grow to a max of about 2ft just because like growspecialist said they can double and sometimes even triple in size during flowering.

very nice and well thought-out setup. +rep for you

I would start out with the cooltube light and a couple fans. once you got those setup and actually start measure your temps. if they are too hot add another fan, ac,etc. you probably wouldn't want a dehumidifier because the plants require a good amount of relative humidity and the dehumidifier...

i agree with this

https://www.rollitup.org/indoor-growing/18861-mylar-vs-aluminum-foil-vs.html

you can counteract the heat with that cooltube light. run ducting and a fan to it that way you can exhaust the heat coming from the light. also throwing in an intake fan to get fresh cool air in, box fans or oscillating fans to keep air moving in your room, and also an ac would work. I had to...

First off with a grow op that size, cfl's are a waste and a joke. 20plus plants goin you would need a shitload of cfl's to effectively spread out the light output. def get a 1000W mh or 2-600W for vegging. You could even use hps or get the switchable ballasts if so inclined. second for the...

i think he meant harvesting 20 plants not just one or two

mirrors are very good at reflecting light but they create hot spots on your plants that might burn them. use mylar or a flat white paint

if you got a local hydro store you can go there or possibly a nursery. if not get a prepaid visa gift card, pay for that with cash and then order the nutes.

are you asking how to control the lighting cycle to keep it 12/12? if so get a timer.

leave the lights off until they break the soil surface. also what kind of light do you have hps, mh, cfls, fluoro? if you have hps or mh keep them far enough away from the seedling so as not to burn it. cfls and fluros don't emit as much heat but you must still be careful of them as well. i...

i think you've got your fans right. hot air rises and you want your exhaust fan to take out the hot air . if i were you i would look at trying to pick up a cheap hps light to help increase your yields like High Tech Garden Supply . also i didn't see you mention nutes. what nutes have you been...

they have some blankets you can put over your crop overnight to help provide some relief from the cold. my uses them for his tomato garden when it supposed to frost overnight and i guess it works pretty well

yes you can but change the lights back to 18/6 asap after determining sex

some do some don't simple as that. and i haven't seen any scientific evidence to back either side. experiment away and let us know how your results are

looked in on your other grow and my god man. how much more bud do you need lol. wanna send me some haha:mrgreen:. wish you well on your new grow. 2-1000W hps lights should be a killer setup.