FIRST GROW EVER, wanting to use 315 CMH lights....HELP

bammer_101

Member
As of now I've been reading for a few months but haven't bought any equipment. I'm ready to start purchasing! I was thinking of possibly running 3 315 CMH in a 4x8 SCROG grow....

any advice or tips would be greatly appreciated!
 

projectinfo

Well-Known Member
As of now I've been reading for a few months but haven't bought any equipment. I'm ready to start purchasing! I was thinking of possibly running 3 315 CMH in a 4x8 SCROG grow....

any advice or tips would be greatly appreciated!
Thats alot of work for a first grow . Do you have the time needed to build, care for, research, and money needed to take on such a project ?


Youll need a good a/c, heater, humidifier, dehumidifier, inline fans, carbon filter and fan, water pumps , air stones nutrients additives, snake oils, more fans, clones/ seeds

Make sure you have alot of spare time and money, and pure fucking ambition to get to the end of a grow and be happy with the smoke.

Growweedeasy.com is a great resource for you.

Alot of this your going to haveto learn on your own through trial and error . Or just use google..

Google.com
Enter your question here : forums
Put a work in quotation marks if you want a certain word that must be included in the search

Google.com
Question here : forums "cmh 315"
 

5BY5LEC

Well-Known Member
It is doable though, just a lot of work. Not only do you need to build your setup you also have to learn how to grow in it.
I scored two LEC's off craigslist for cheap for my first ever grow. Powerful lights, I will say that.
Everyone says to start in coco or dirt but I went right to RDWC since I wanted to build one. One positive side of hydro is that I can easily fix any problems or beginner mistakes easier.
Designing and building everything honestly was the easy part!
Grow weed easy.com is a great resource.
I have never grown anything besides this. Not even a houseplant. So it is doable.
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First let me say I've never personally run CMH lights, I run mh/hps in a vented hood. But from what I've read - CMH lights don't do well finishing / flowering. Im sure I'll get roasted for that one.
 

Coloradoclear

Well-Known Member
Your lights are awesome and I got piles of buds to prove that. These guys are right to say you have a major undertaking ahead of you. If I was you I would run half your set up the first time to get a feel for DWC since you said you have never had a house plant. Hydro is easy until ITS NOT! Do your homework before you pop a seed. Make sure you have measuring tools for PH and PPM. The folks on here diagnosis PH and over fertilizer problems in hydro every day, use them as a good resource.
 

5BY5LEC

Well-Known Member
Yup, get good meters. Bluelab combo's are expensive but they work well and you are not guessing. Even a cheap PH and PPM pen off ebay will get you by if you keep it calibrated.
 

hotrodharley

Well-Known Member
Hanna instruments are used in reference laboratories around the world. Affordable, precise and reliable. Way cheaper than Blue. Short range pH test strips don't need calibration.
 

MichiganMedGrower

Well-Known Member
First let me say I've never personally run CMH lights, I run mh/hps in a vented hood. But from what I've read - CMH lights don't do well finishing / flowering. Im sure I'll get roasted for that one.

The Phillips 315 3100k actually finished most plants faster than a Hortilux super hps 600 in my room. About a week faster in most cases.

But it does tend to grow more compact leafier plants and looser lowers and 30% or so less yield than the 600 hps in my tests.
 

Psyphish

Well-Known Member
Huge grow tent, CMHs, silent inline fan (Iso-Max), good quality filter (Rhino), fans for wind, coco coir, AN pH-perfect nutrients. That's what I'd use, never needed to build anything or use an AC or a dehumidifier etc.

But there are many ways to grow weed and your location dictates what you need for climate control.
 
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