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

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!

bammer_101 said:

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!

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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"

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.

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.

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.

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.

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.

Doulovebeef said:

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.

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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.

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.