Predicting Yield

Yield seems to be something that is unpredictable because of all the factors, but what if there was a log filled with reliable real-grow statistics for growers to compare with their grow.
The logs would include the key factors like:

• Strain
  
• Lighting
  
• Container Size and Type
  
• Medium
  
• Nutrients
  
• Plant Size (LxHxW)
  
• Plant Age (Veg Length and Flower Length)
• Wet Weight
• Dry Weight

Now say a grower is growing Nirvana White Widow under 600 HPS in 5 gallon containers in FFOF using the FF trio. His plants are 3 ft tall and 2ft in diameter, and veg for 4 weeks and flower for 10. He sees that there are 4 similar growers from different growers that produced between 1-4 ounces per plant. That would be his range. Would this work? Or are there more factors? If so what did I miss?

wow , 1 to 4 ozs per plant. Thats not a very accurate guess.
Waste of time.
Just grow a healthy plant and call it good.

It doesnt exactly work lie that partner... But if what you are getting at is what I think you are getting at, I say this. Start your seeds/clones in bigger pots or buckets if not the 5 gal. Keep vary happy no need to feed for first 30 day with ffof. Depending on how many colas you get and how healthy your plant is may greatly determine how you yield. Id say if you start big you will get at least 1 ounce. But thats granted you can keep a healthy plant alive. If you are good you could def get more than 1 zip

dadio161 said:

wow , 1 to 4 ozs per plant. Thats not a very accurate guess.
Waste of time.
Just grow a healthy plant and call it good.

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Just for an example. If say RIU was to use results from grow journals (To ensure that they were valid), there could easily be 5-25+ grow for each specific setup with a year or so. All one would have do is fine all these grows that match up with their setup and find the average. That should give them a rough estimate, but it willl vary based on the setup. For example a SOG setup using 6"clones will probably vary only within a few grams from the average, but 8ft Sativas could vary a few ounces.

BBbubblegum said:

Yield seems to be something that is unpredictable because of all the factors, but what if there was a log filled with reliable real-grow statistics for growers to compare with their grow.
The logs would include the key factors like:

• Strain
  
• Lighting
  
• Container Size and Type
  
• Medium
  
• Nutrients
  
• Plant Size (LxHxW)
  
• Plant Age (Veg Length and Flower Length)
• Wet Weight
• Dry Weight

Now say a grower is growing Nirvana White Widow under 600 HPS in 5 gallon containers in FFOF using the FF trio. His plants are 3 ft tall and 2ft in diameter, and veg for 4 weeks and flower for 10. He sees that there are 4 similar growers from different growers that produced between 1-4 ounces per plant. That would be his range. Would this work? Or are there more factors? If so what did I miss?

Click to expand...

Forgot air

Its guesswork, with so many variables its impossible for a person to say with any reliable certainty.

HOWEVER, I do know what would make your approach actually useful to every grower.

If each grower on here kept a prepared log, in the right context, the data could be analysed which could benefit everyone as a whole. This wouldn't provide accurate specific yield predictions, but it would provide a solid and scientific means of people being able to compare their growth/attributes/pheno's with everyone else who has grown/growing that strain etc.

Basically, it would require a spreadsheet with an agreed period of data entry (ie once a week), with fields for various attributes. In order to work, it would require people complete the log properly, and agree to be part of a bigger thing.

- It would need to be started at the beginning of the grow
- It would need to have each entry filled at the specified duration through to harvest

I could easily write some software to turn that data into charts, graphs and statistical 'probabilities' of yield versus potential yield.

Downside is, I'd imagine 99% of people couldn't be assed doing so, lol

i would expect the lower and when you comeout with more you are super excited and happy. you just gotta grow her focus on that there are still problems that can/will comeup even the last couple weeks that could ruin anything. ive lost some bud to PM in the last couple weeks that is not fun to deal with.

u would have to have the same pheno's as the ppl your comparing to.there is a chance u will get the same pheno but then again theres not

I'm definately going to get 1 ounce bare minimum per plant I'm currently growing.

The reason I know that with certainty, is because if its less, I'm screwed.

RollupRick said:

I'm definately going to get 1 ounce bare minimum per plant I'm currently growing.

The reason I know that with certainty, is because if its less, I'm screwed.

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That's what I look for too. I use 3 gallon pots for flowering. Some strains like Cotton Candy just seem to leap out of the pot right from the clone. Others like Kalisnkova and Love Potion creep.

To keep track of things, I use a plain old excel spreadsheet. Works swell and no coding required.

Closetgardner said:

u would have to have the same pheno's as the ppl your comparing to.there is a chance u will get the same pheno but then again theres not

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Makes sense, but couldn't you look at the log for someone who was growing the same strain as you and their plants were similar in size to yours. This would mean the phenos are similar.

Last year was my first outdoor grow. I had 4 plants 2 GDP and 2 Grape Ape. Had them all in 10 gallon pots with roots organic and used FF nutes the whole way through. Ended up with just under 10 zips dried and cured.

you are missing a lot of factors. one of the biggest is PH... especially with fox farms, since your ph range needs to be around 6.3-6.8 otherwise you will cause nutrient lockout and your plant could only get half an ounce...

Another huge factor is if you cut it a week to early, the buds will be 15-30% lighter than the person who let the plant fill out to the max. If the person cuts it way to early the buds might be 50% lighter than normal.

more factors; how thick the stem is, node spacing, plant width, etc...

I will try to explain this as easy as possible, there is no way to gauge how much a plant will yield. Sure you can give an estimate like 1-6 ounces... but honestly that doesnt help at all.

beginner.legal.growop said:

you are missing a lot of factors. one of the biggest is PH... especially with fox farms, since your ph range needs to be around 6.3-6.8 otherwise you will cause nutrient lockout and your plant could only get half an ounce...

Another huge factor is if you cut it a week to early, the buds will be 15-30% lighter than the person who let the plant fill out to the max. If the person cuts it way to early the buds might be 50% lighter than normal.

more factors; how thick the stem is, node spacing, plant width, etc...

I will try to explain this as easy as possible, there is no way to gauge how much a plant will yield. Sure you can give an estimate like 1-6 ounces... but honestly that doesnt help at all.

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A tab for problems with the grow could be added, things like PH and nutrient issues, and light leaks ect.
Cutting the buds early would be under the flower days.
Things like stem thinkness and width would be under the plant size.
Maybe another tab for bud sites and another tab for different methods of cultivation: Topping, Fimming, SOG, SCROG,LST.
The example with 4 users getting 1-4 ozs doesn't mean the person can expect 1-4...that isn't precise. 1+2+3+4=10. 10/4=2.5 ounces, that would be the range. I would say a good rule would be give or take 20&. So 2-3 ounces would be reasonable.

It might be done but it is more likely than not just going to be a waste of time. Why not just look at the size of your plant and take a guess, it'll most likely be no less accurate.

tip top toker said:

It might be done but it is more likely than not just going to be a waste of time. Why not just look at the size of your plant and take a guess, it'll most likely be no less accurate.

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It is rather hard to do.
Here is my smallest female, she is around week 5 and is 2 feet tall but very skinny.


Here is my bigger female, I am pretty sure she re-vegged and the weird leaves have me confused. But she is very bushy.

So tell me my yield, just by looking at it.

The point was you guess your own yield. I don't know anything about your growing experience or even locatoin to know what kind of sunshine you get. That and it doesn't even appear to be flowering so you could veg it 5 times that size before it goes into flowering. I cannot do anything but give you a bullshit guess plucked out of thin air.

Those leaves do indeed look like it's been re-vegging.

it is also grower skill, an enormous factor that you really cant possibly quantify... but yea you listed what you WOULD compare assuming someone WOULD want to do that.

all probly know about seed finder.com they have alot of info there. the place you buy seeds normally has a yield amount in the description in a good setup with a good pheno but how good you are at growing will be what decides yield in the end

one oz a plant is it worth it all the risk i wont do any unless there gonna give me at least 3 - 4 oz a plant the worst i have ever done would be 2and q oz off one i use
square pots 12 ltr
canna a and b nutrient
for flowering i add canna accelerator boost or spoon mollases
under a 400 metal hallide dimmable to 250 with super spectrum im in week 4 at the min and they look boom il ad some photos tommorow on my page check them out good luck with your grow let me know how u get on hope u do well