So you want to grow Marijuana, your ?'s answered here.

[purp_kush]

when the seeds have sprouted i put on 24 hours of continuous light?
when do i switch to 18 hours on, 6 off
is there a thread for the lighting schedules?? i cant seem to find it
thanks

[BKKG]

You can switch to 18/6 if you want fairly soon after the seeds have sprouted, but most people hold off if they can until the vegetative stage proper starts, which is generally accepted to be after the third set of true leaves open. You don't need to switch to 18/6 if you don't want to though, 24/0 is fine up until flowering.

For flowering, you'll want to switch to 12/12.

You don't need a thread for lighting. There are at least a dozen threads on this site, as well as grow guides and books available both here at gc and elsewhere that will tell you the same thing about lighting schedules that I just did.

[purp_kush]

is this the right ph meter and will it work for soil and water testing?> thnx

[purp_kush]

Originally Posted by jcj77d

the rule of thumb is 1 gal pot size for every foot in plant height, ex: 3ft plant = 3gal pot, & the rule of thumb for light is 100w per plant or a minimum of 5000 lumen per plant. what the color temp of the bulbs (kelvins). you need 6500k (cool white or daylight) for veg & 2700k (warm white) for flowering.

i have two daylight philips medium base lights on one plant
is this enough?
"lumens:1620
watts:100"

5000 lumens would be about 4 of these lightbulbs, is that too many on one plant?

[jcj77d]

Originally Posted by ocitown

Does it matter where in a 10x10 room a co2 burner is,hight and middle vs side or corner? Also when using it with a PPM meter is it better to place them as far apart as possible or about half the room width apart?

you want it up high, b/c co2 is heavier than o2, & placing it, id try to center it over the plants, or on either side w/ a fan blowing the co2 accross the plants. & place them near the plants, since u need to watch the co2 ppm around them.

[jcj77d]

Originally Posted by ocitown

In a sealed room with a co2 burner and light with a simple timer should i just add a timer to the PPM meter/burner and set the burner to come on 15 min after the light? And im using a port AC unit which needs an exhaust hose out,but wont this be waisting my co2,making the room a negative pressure room? I know i dont need to vent the AC unit but that will cause the AC unit to work longer and harder,Whats the best option for all this?

yea just set the timer when the light come on after 15min, this allows the plants to wake up & open their stomas to take in the co2. to me id just put the port ac in room & not vent it outside, just like a reg ac it recirculates the air inside the house, just put it in the lowest & coolest place in room & put a fan in front to push the cool air further, & vent it up high & away from unit..

[jcj77d]

Originally Posted by ocitown

The lumatek ballast power plug has two flat and the ground different than the 220 volt timer which has one flat and one verdical prong and the ground,i assume they are dif. amp. ratings. Whats the best way to deal with this delemma?

get something like this, http://www.voltage-converter-transfo...agetransformer , or this http://www.voltage-converter-transfo...13-plugadapter

[jcj77d]

Originally Posted by purp_kush

when the seeds have sprouted i put on 24 hours of continuous light?
when do i switch to 18 hours on, 6 off
is there a thread for the lighting schedules?? i cant seem to find it
thanks

the only time u need to change light cycles is when u flower on a 12/12 light cycle. you can grow during vegging useing your choise of light cycles, eg: 24/0, 22/2, 20/4, 18/6, what ever you wanna use, but the most popular are 24/0, & 18/6, so pick 1 & stay w/ it until flower.

[jcj77d]

Originally Posted by purp_kush

is this the right ph meter and will it work for soil and water testing?> thnx

i have 2 of these, & they arnt very good, they work for a while & then they arnt accureate, they are good for measuring moister & light, but ph is really iffy w/ these. try to get a digital one. oh & they dont work w/ water ph to well, just soil ph.

[jcj77d]

Originally Posted by purp_kush

i have two daylight philips medium base lights on one plant
is this enough?
"lumens:1620
watts:100"

5000 lumens would be about 4 of these lightbulbs, is that too many on one plant?

the more ligt the better, if it still young (days) that will get you by, but after wk 2-3 youll need more 5000 lumens or more, & dont use reg light bulbs, either flouros, cfl, or hid. & ill be running about 53,000 lumens on 1 plant.

[jcj77d]

Originally Posted by jackarmy

Thank you for your last response

If you get sometime will you please check these two links to see if theres anything suitable there for the the plants.
http://www.focusdiy.co.uk/bin/venda/...&setsortprice=

http://www.focusdiy.co.uk/bin/venda/...&setsortprice=

Also would this light be ok for all stages-as long as its cheap..-max price to bid?
http://cgi.ebay.co.uk/ws/eBayISAPI.d..._promot_widget

depending on what your looking for, i could find a few things, as for the light, its good for vegging (6500k), but flowering plants need 2700k.

[ocitown]

The lumatek 1000w. ballast is 240 volts which has a 240 v. 3 prong line cord w/the top 2 prongs horizontal or flat and the lower standard US round type prong,it needs to be put on a timer which i got but the prongs are a little different with one of the flat prongs turned 90 degrees. So how do i plug the ballast into the timer,with an adapter from female w/ 2 top flat (from the lumatek)to a male w/the 1 turned prong to plug into the timer? I didnt find that adaptor on your site.

Originally Posted by jcj77d

get something like this, http://www.voltage-converter-transfo...agetransformer , or this http://www.voltage-converter-transfo...13-plugadapter

[XemiS*RR]

You know how different strains take longer than others? What determines that? Would that be how long it takes for the trichromes to mature? or are there other factors besides the trics'?

[ocitown]

My 10x10 sealed grow room plan is to vent the one or two 1000w lights from outside the room to outside the room using the 757cfm vortex can fan so as to keep the light cool and put it ~12" from the plants but since it will be 50F in eve. and 60-70F in the day for the next 6 months can i just run a filter on one end of the lights and through the lights into the vortex (on a speed control btw) and back into the room to keep it real warm so my co2 burner will work better maybe 85-90F during this winter lights on time? Will i need a heater during the girls sleeping hrs.? I heard the night time temps should be kept no more than 15F. lower than the day temps.So is 85-90F best for day(with the co2 burner on 1500PPM)and no lower than 70F. night temps? OH,and can the port AC unit wait till summer,I will be using a dehumidifier,but which brand is good?

[ocitown]

I would guess that dif. strains which grow all over the world have such a vast dif. in climate conditions and elevations. Many years of evolution with the changing weather proly add to it constantly. But this is just my guess STONED.

Originally Posted by XemiS*RR

You know how different strains take longer than others? What determines that? Would that be how long it takes for the trichromes to mature? or are there other factors besides the trics'?