Growing with metal halide lights in the
The Grow Room forums; I have a 1000 watt metal halide set up. After my seeds sprout they grow very slowly for the first ...
Growing with metal halide lights
I have a 1000 watt metal halide set up. After my seeds sprout they grow very slowly for the first few days and gradually turn yellow and die. this has happened three times now. Its in a closet space that is not easy to keep cool. some people have said I might need some kind of light filter. some people have said my lights might be too close. I really don't know what I am doing wrong. the lady I bought the light kit from said the bulb was a "metal halide bulb, but that it has the full spectrum of light from metal halide and high presure sodium combine, so I can use it from start to finish". I'm learning as I go, was it a mistake to get that bulb. Should I have just got the regular metal halide. Is my growing area to hot. I really need some Ideas here, I spent alot of money on these lights.
what are your temps running at bro? and are you pH'ing your water? also, try starting off your seedlings with fluorescents until theyre about 6" tall. then keep the metal halide light about 20-24 inches away from the top of them. and do you know what the bulb was called she sold you? because ive seen two parts bulbs that incorporate a 400w MH and a 600w HPS all in one bulb. but i have only seen these once.
I don't know what the temps are at. But they r really hot. what would be an ideal temp, and what would be the best way to cool. no i'm not ph'ing my water and I don't know how. The lady I bought the kit from only said it was a mh bulb but that it also had the same light spectrum of hps, she didn't say any other kinds of names. The name on the box said something like argosun or ergosun, but I threw it away. Is there any books you could suggest. I really have know idea what I'm doing. Also, would any kind of flourecents work or is there some kind of special ones specificaly for growing
Last edited by greenjimmy; 10-08-2006 at 10:57 PM.
if its in a real small grow space, and you cant exhaust why dont you use a smaller 400 watter?
agrosun, yes it does have a slightly higher red spectrum then standard MH bulbs. temperature and pH and the most important steps in growing anything. ideal tempertature is 75-85 degrees. pH should be around 5.5-6.5 . here are some free videos that are pretty decent and go over the basics pretty
Top Quality Home Growing - Google Video
this one is old but still good info
Stoned Free Guide to Growing Cannabis. - Google Video
a 400w bulb would have been cheaper and easy to maintain temps in a grow room as well
Originally Posted by crickitmd
you can use compact fluorescents for them or just use the cool white and warm white bulbs in combination for seedlings
Temp is more then likely ur prob, but just out of curiosity what type of medium are u using...i remeber that in my 1st attempt i mixed to much nutes in the soil and the Nitrogen was taking the soil ph as low as 5.2 wich was burning the plants down....
Sounds like you are cooking those poor little things. You should have a termometer in there. Never let it get past 85 degrees.
A flourscent will work for seedlings. But once they start to put on growth the flourscent will just make them leggy and worthless.
You will need at least a 400 watt and better a 1000 watt light. Not halide! High pressure sodium is the way to go.
You will need two bulbs. One for growth and one for flowering.
You first need the right set up. This included venting. This will prevent over-heating so you don't cook your plants. Also a good timer (not a cheapie from WalMart).
I set my grow room up in our spare bath. We use the bathtub to set the plants in (no water problems). The window above the tub is walled off. In one half is an air conditioner for summer growing indoors. The other half allows the hot air to vent outside via the exhaust fan. I have my light on wheels attached to the ceiling so I can raise and lower it as I see fit.
I keep a termometer in there so I can moniter the temp. and I also keep a plant moisture meter in there so I know when to water. Overwatering is a newbies biggest mistake. I don't have a problem with humidity since the exhause fan runs when the light does (18 hours a day).
Every set up is a little different as very grow room is a little different. But the correct set up is vital. I can grow killer smoke when I respect the plant and let it grow under it's best conditions. Well killer seeds help too!
If in soil, a PH of 7.0 is fine.
By warmboe in forum Indoor Growing
Last Post: 09-21-2009, 12:42 PM
By KronToker in forum Indoor Growing
Last Post: 03-01-2009, 01:27 PM
By colbyg311 in forum Indoor Growing
Last Post: 02-16-2007, 11:11 PM
By nongreenthumb in forum General Marijuana Growing
Last Post: 01-14-2007, 08:30 AM
By rollitup in forum General Marijuana Growing
Last Post: 11-10-2006, 03:17 PM
Tags for this Thread