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Pot size confuses me.

I dont mind the numbering system for standard nursery pots.  Its the trade size that gives me fits.  A five gallon pot holds 3.8 gallons.  A one gallon pot only holds 3 quarts.  Does anyone have a clue why?
 
qBj14gW.png

from http://americanhort.org/documents/ansi_nursery_stock_standards_americanhort_2014.pdf
 
 
1 gal = 231 Cubic Inches 
#1 container may be smaller or larger than  1 gal
 
you must choose the right manufacturer who manufactures a pot the size you want
 
Was it manufactured in the US or in country that uses the metric system?
A 15 liter pot could be roughly translated to 5 gallons , but is closer to 3.8 .
 
juanitos said:
you're confusing pot# with volume.. the pot# is just an approximation and doesn't garuntee volume.
Nope.  But have seen people confuse the pot number system with volume.  Scroll to bottom of this link for their chart:  http://www.greenhousemegastore.com/product/elite-nursery-container/nursery-pots

Five gallon "Trade Size" has an actual volume of 3.8 gallons. 
One gallon "Trade Size" has an actual volume of 3 quarts.

Someone in another forum gave me the strangest explanation.  She might be goofing with me.  It might be urban legend.  But here goes.  After WWII, there were US manufacturers who had a huge surplus of the cans they used for K rations.  A gallon would hold a gallon of food, a five gallon would hold five gallons of food.  But because the war was over, the government wasnt ordering K rations.  So they got stuck with tons of these standard sized cans.  To get rid of them, they punched holes in the bottoms and sold them as plant pots.

So many were sold, that a standard was set for their size.  Ah but when they ran out, new production was tapered so they would stack for easy shipping and storage.  So the normal outer diameter of the food container became the top diameter of the tapered pots.  The size people called one gallon kept on being called that even though being tapered it only held 3 quarts.

Is it true?  I dunno but I know if I buy a five gallon plant pot it is much smaller than a five gallon bucket of paint.
floricole said:
 
#1 container may be smaller or larger than  1 gal
Oh damn that is funny on so many levels.  Biggest one being this is a 'standard'.
 
ajdrew said:
Nope.  But have seen people confuse the pot number system with volume.  Scroll to bottom of this link for their chart:  http://www.greenhousemegastore.com/product/elite-nursery-container/nursery-pots

Five gallon "Trade Size" has an actual volume of 3.8 gallons. 
One gallon "Trade Size" has an actual volume of 3 quarts.

Someone in another forum gave me the strangest explanation.  She might be goofing with me.  It might be urban legend.  But here goes.  After WWII, there were US manufacturers who had a huge surplus of the cans they used for K rations.  A gallon would hold a gallon of food, a five gallon would hold five gallons of food.  But because the war was over, the government wasnt ordering K rations.  So they got stuck with tons of these standard sized cans.  To get rid of them, they punched holes in the bottoms and sold them as plant pots.

So many were sold, that a standard was set for their size.  Ah but when they ran out, new production was tapered so they would stack for easy shipping and storage.  So the normal outer diameter of the food container became the top diameter of the tapered pots.  The size people called one gallon kept on being called that even though being tapered it only held 3 quarts.

Is it true?  I dunno but I know if I buy a five gallon plant pot it is much smaller than a five gallon bucket of paint.

Oh damn that is funny on so many levels.  Biggest one being this is a 'standard'.
I posted that explanation here, and on Gardenweb a long time ago. That is the explanation I was told by my college horticulture teacher, David McLean. http://thehotpepper.com/topic/38473-5-gallon-pots-are-not-5-gallons-word/?p=805194
 
thegreenman said:
I posted that explanation here, and on Gardenweb a long time ago. That is the explanation I was told by my college horticulture teacher, David McLean. http://thehotpepper.com/topic/38473-5-gallon-pots-are-not-5-gallons-word/?p=805194
Oh damn I like that one even better.  I suspect all are likely bs, but I like that one more.
 
hot stuff said:
I just figured it was legalized theft like the lumber industry.
The story gets better.  Someone pointed me to a story of how Lowes has been sued and lost 1.6 million over exactly what you just mentioned.

http://www.marinij.com/article/ZZ/20140827/NEWS/140827791

 
 
Well lumber companies for decades have standardized theft by having 2x4 be something more along the lines of 1.75x3.75 or something like that.
 
hot stuff said:
Well lumber companies for decades have standardized theft by having 2x4 be something more along the lines of 1.75x3.75 or something like that.
Did you check the link?  Lowes got sued, lost 1.6 million over it.  I laughed my ass off.
 
ajdrew said:
Did you check the link?  Lowes got sued, lost 1.6 million over it.  I laughed my ass off.
Yeah, but I'm thinking they must have had boards that were even less than industry standards, in which a 2x4 is not really a 2x4. If they were sued for the industry standard of a 2x4 which is not a 2x4 then the whole industry has been turned on their heads and a lot of new labels are going to have to me made for every store.
 
floricole said:
qBj14gW.png

from http://americanhort.org/documents/ansi_nursery_stock_standards_americanhort_2014.pdf
 
 
1 gal = 231 Cubic Inches 
#1 container may be smaller or larger than  1 gal
 
you must choose the right manufacturer who manufactures a pot the size you want

Good reference.

Interesting that although the standard states:
"The volume ranges for container classes #1 through #100 include the volume of a container that, if such a container were
manufactured, would hold the equivalent number of gallons as the container class number."
,
there is a wide range of values for each size.

The standard then adds the disclaimer:
"Standard users should refer to container manufacturers volume specifications for compliance
with the Standard."


So, although there are established standards, they are not very precise.
 
Funny.  So the word 'standard' should be changed to 'standard rang'.  Just seems to much easier to have a gallon hold a gallon.
 
ajdrew said:
Oh damn I like that one even better.  I suspect all are likely bs, but I like that one more.
 
The story gets better.  Someone pointed me to a story of how Lowes has been sued and lost 1.6 million over exactly what you just mentioned.

http://www.marinij.com/article/ZZ/20140827/NEWS/140827791
 
This is what I call a California money grab. Nominal vs actual sizes have been around for a long time. If people don't know about it when they purchase stuff, then that's on them to find out. Someone in those four California counties were looking for, and found, an easy mark. Instead of suggesting that the legislators legislate, they sue someone. Typical in the land of fruits and nuts.
 
1 litre = 0.219969 uk and 0.264172 us gallon respectively so you have also to check where they are coming from if ordered from internet have fun
 
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