Ok, old hippie with a math question...

How does this gm per watt thing work? What are the base perimeters? For instance...If I grow 1 plant under 1,000w should I be able to pull 1000gm or 35 ounces?? What other variable conditions would be required to yield a close amount of weight? Now by the same token if I grow 2 plants under the same 1000w in the same conditions should I be able to pull 70oz.? or still 1,000gm? or half of that because it is 2 plants?

if this theory is correct I will (provided my conditions are optimum) I will produce 800gm with 2 plants under 400w? Or would it be 200gm/plant? etc...

If you know something even close to the correct answer and you can explain it to me VERY simply and please reply.

A 1:1 ratio of gram per watt requires full optimization of the growing area. Now you can exceed this by using various training methods such as a scrog as well as using co2, having a high yielding strain, and have the plants fined tuned (nutritionally). There is no equation that will give you how much you are going to yield, since there are too many factors that can influence the outcome. It also depends on a mixture of how many plants you are flowing and how long you have vegged them for.

Big Trees said:

A 1:1 ratio of gram per watt requires full optimization of the growing area. Now you can exceed this by using various training methods such as a scrog as well as using co2, having a high yielding strain, and have the plants fined tuned (nutritionally). There is no equation that will give you how much you are going to yield, since there are too many factors that can influence the outcome. It also depends on a mixture of how many plants you are flowing and how long you have vegged them for.

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HMMM..ok, I get that and always have. What I really did not understand is why I see so many growerz repeatedly claiming they are regularly doing it, and that everyone else should be able to as well?

I have seen trolls around RIU insulting growerz (especially newbies) because they have not been able to pull the 'expected' weight, and that a half blind retarded monkey would be able to! LOL!!

It's just stoner talk, truly meaningless without a time parameter.

It really means nothing. You need to figure the gram per watts over length of time the grow took.

Say you get that 35 ounces in 7 months and i get it in six. My ratio would be better.

The next part of your question, that ratio is for bowever many plants you run. One or 100 makes no difference.

I would not get caught up in it, it is speculative at best and doesn't truly mean much

$bkbbudz$ said:

How does this gm per watt thing work? What are the base perimeters? For instance...If I grow 1 plant under 1,000w should I be able to pull 1000gm or 35 ounces?? What other variable conditions would be required to yield a close amount of weight? Now by the same token if I grow 2 plants under the same 1000w in the same conditions should I be able to pull 70oz.? or still 1,000gm? or half of that because it is 2 plants?

if this theory is correct I will (provided my conditions are optimum) I will produce 800gm with 2 plants under 400w? Or would it be 200gm/plant? etc...

If you know something even close to the correct answer and you can explain it to me VERY simply and please reply.

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Grams Per Watt is just a measurement done after harvest and cure. It doesn't really tell you anything due to the amount of factors that actually go into growing.

Cyrus420 said:

Grams Per Watt is just a measurement done after harvest and cure. It doesn't really tell you anything due to the amount of factors that actually go into growing.

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Yuppers pilgrim!

Lets not forget some growers flower for what some see as to long for a larger yield.

Grower one pulls when they see the first amber.

Grower two pulls when his plants are as big as he thinks they will get.

Two different results. Is one wrong? Well..we can argue that for ever but both growers did what they prefer to do, so id say both are right for the result they wanted.

It really boils down to footprint and veg times to give a very basic "blanket" answer.
If you grow 1 large plant under 1-1K hps, you should be able to grow "blank grams per watt".
If you grew 16 plants under the same 1K hps light footprint then your GPW should be relatively the same.
Now keep in mind, you will need to expend more energy in lighting for a longer period of time to veg the 1 large plant big enough to utilize the entire footprint as to where you will only need to veg a very short time to get 16 plants to fill the same footprint. Having more plants veg less time will use less energy which in turn will raise your GPW average for that specific size footprint. I hope this makes sense?
As mentioned there are many more variables that come into play like exhaust fan power consumption,fans,chillers,bubblers,AC,heaters or any other power consuming item incorporated into the room. All needs to be considered when measuring GPW. if not everyone considers the same variables then result numbers are going to be uncomparable from one persons grow to the next. I dont try to "keep up with the Jones" but I think a benchmark for the novice grower is about the .5 gpw average. If you are getting under those numbers, then there are likely things in your grow that can be dialed in better or better genetics are needed, trim the fat so to speak on power consumption of the room etc. Different configurations will yield different results. Find the one that suits your grow style and budget.

Cyrus420 said:

Grams Per Watt is just a measurement done after harvest and cure. It doesn't really tell you anything due to the amount of factors that actually go into growing.

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Some of us make concentrates,Hash, Shatter so its almost impossible to figure actual weight.$ per watt is what I look @ and I am doing just fine.

sanjuan said:

It's just stoner talk, truly meaningless without a time parameter.

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Yes, that's correct, it's just stoner talk, and I started it.

It was 20 years ago, when I was a regular poster in the original cultivation forum, adpc on UseNet.

At the time, I tried to add something clever to the end of my posts, and this is one of those things that I posted. The growers in that forum posted specific results of our crops, so it was easy for other growers to compare how they were doing. No one ever achieved 1 gram per watt, and I noticed that.

There was a TV commercial for California Almonds that used the slogan "A can a week, that's all we ask." So I came up with "A gram a watt, that's all I ask."

The next thing I knew, the members of the new web-based forums like Overgrow and Cannabis World started using that phrase like it was gospel. I've always gotten a kick out of that, but the 1-gram/watt makes for a good goal, but few growers ever get that amount.

It's more of a goal which don't really mean shit as I seen someone get over 2 grams per watt on a vertical grow. Then you got some guys who use a lot of side lighting may be better for overall quality but I doubt it is as good for production per watt. Then AC and all some people use really need in the south.

A good goal to aim for with indica strains on a 4 week veg and 8/9 weeks flower....

This is what it means to me.

rollitup said:

Yes, that's correct, it's just stoner talk, and I started it.

It was 20 years ago, when I was a regular poster in the original cultivation forum, adpc on UseNet.

At the time, I tried to add something clever to the end of my posts, and this is one of those things that I posted. The growers in that forum posted specific results of our crops, so it was easy for other growers to compare how they were doing. No one ever achieved 1 gram per watt, and I noticed that.

There was a TV commercial for California Almonds that used the slogan "A can a week, that's all we ask." So I came up with "A gram a watt, that's all I ask."

The next thing I knew, the members of the new web-based forums like Overgrow and Cannabis World started using that phrase like it was gospel. I've always gotten a kick out of that, but the 1-gram/watt makes for a good goal, but few growers ever get that amount.

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You were alwayz a trend setter PR.

What about gram per KW hour

Any thing over a lb per plant your doing well ,7 per plant is still good going don't get in the mind set that if you ain't pulling a gram per watt your failing at growing because this is not true,a lot of factors come into a gram per watt,how many lights are been used how bigs the room how many plants light numbers,just grow to the best you can small areas it's very hard to hit a gram per watt,

As an old guy (not hippie more surf boy), the math made zero sense so I stopped caring lol.

tyke1973 said:

Any thing over a lb per plant your doing well ,7 per plant is still good going don't get in the mind set that if you ain't pulling a gram per watt your failing at growing because this is not true,a lot of factors come into a gram per watt,how many lights are been used how bigs the room how many plants light numbers,just grow to the best you can small areas it's very hard to hit a gram per watt,

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A pound per plant? Holy shit really, I feel so inadequate. Would not a pound be only for a single pot, soil or other method, vegged for a comparatively long period? Just asking because I typically get less than 7 per and think I'm doing real well lol. I just think your numbers are a little big for that I did good feeling , if not I feel bad lol

A pound per plant sounds good, I'm just not into vegging for 2-1/2 months haha