HPS, MH, or Both [Archive] - Green Grass Forums

amdp

07-24-2006, 09:33 PM

I'm about to start my second grow. I grew with 400W HPS for the entire 1st grow and did'nt get the results I wanted. I just purchased a 250W MH. I'm growing 1 each of WW, ICE, and Grapefruit.

Shoud I use Both lights for the entire grow or use the MH for Veg and the HPS for flowering?

orangeman

07-24-2006, 10:21 PM

Just get a San Agro HPS light. They contain an element that puts out blue light to help fill in the parts of the spectrum absent in standard HPS and MH.

katacus

07-25-2006, 12:34 AM

What size is your grow room?

mscaboo

07-25-2006, 12:41 AM

what was the problem with your first grow?

amdp

07-25-2006, 02:09 AM

Katacus, My grow room is 3 ft wide, 4 ft long, and 5 1/2 foot high.

mscaboo, I had one plant that yeilded about 8 grams. Very short plant, only 20 inches tall at harvest. I had to cut the veg time down due to time constrants (ie. Moving).

LIP

07-25-2006, 06:41 PM

20 inch and only 8 grams?

Then there was deffinatly something wrong there.

amdp

07-25-2006, 07:27 PM

Yeah, the bottom 6 nodes died off after transplanting.

amdp

07-25-2006, 07:34 PM

I made the rookie mistake of cutting off fan leaves 2 1/2 weeks before harvest, along with many other mistakes. I'm hoping to do much better with my next grow.

stinkyattic

07-25-2006, 08:25 PM

Use flourescents (tube or CFLS) for young seedlings and plants up to about 3 weeks. Then put them under your MEtal Halide. Then for flowering you use the HPS, or both. I use 1x400w HPS +1x400w MH for flower in the summer and my 1000wHPS in the winter when cooling is not so expensive.

Opie Yutts

07-25-2006, 11:35 PM

I would use both lights for veg, but only bloom lights for bloom.

Actually, the ideal situation since you have both lights, is to do sea of green (SOG). Both lights will be on all the time, but not in the same grow area. You could have them in the same grow area, but one or the other must be light-proof due to different schedules. For various reasons I think it is best to light proof the bloom area. This way you harvest twice as often. Much more weed, you know...

job1.5

07-26-2006, 04:34 PM

i would use both all the way thru aslong as heat is not a problem

Dutch Pimp

07-26-2006, 08:05 PM

I made the rookie mistake of cutting off fan leaves 2 1/2 weeks before harvest, along with many other mistakes. I'm hoping to do much better with my next grow.
OK CLASS. What did we LEARN..? ...about fan leaves now?

amdp

07-26-2006, 11:06 PM

don't F$#* with the fan leaves!!!!