Pot litres ain’t pot litres

I have 50l fabric pots which if I empty a 50lbag in fills half way
If I measure the litres 50 measures half way again

why the fook is either the soil short or is the fabric planter double sized lol

feels like I need more soil by the math I could fit 100l in 50l pots

2cent said:

I have 50l fabric pots which if I empty a 50lbag in fills half way
If I measure the litres 50 measures half way again

why the fook is either the soil short or is the fabric planter double sized lol

feels like I need more soil by the math I could fit 100l in 50l pots

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Your logic works only if the density of your medium is 1lb/liter

If you bought a 50 liter bag of mix, your results would be quite different.

I think you are confusing liters and lbs.

there are, for example, 5 gallon bags that are really about 4 gallons if you pack the soil. then there are real 5 gallon bags, that hold 5 gallons.
these are noticeably larger than the 5 gallon bags most of us bought.

iPower Plant Grow Bag 5 Gallon 6-Pack Heavy Duty Fabric Pots, 300g Thick Nonwoven Fabric Containers Aeration with Nylon Handles, for Planting Vegetables, Fruits, Flowers, Tan 2022 Version

i read about the difference years ago. one is for commercial farmers, one is for us home gardeners. something like that.

it's weird and i call them liars. get yourself a true 5 gallon and grow some more buddage.

50l bag biobizz 1 l cup 50 cups fills the 55l bag half way

Dry measure volume (soil mix) isn't liquid measure volume (container size).




"There are very few standards regarding container sizes and volumes. To make it even more confusing, containers that do list volume typically measure using liquid quarts. Of course, potting soil is not a liquid, so the bags contain dry quarts, each of which equals about 1 1/8 liquid quarts. Nor do these figures account for any packing down of the soil (the taller the container, the greater the compression). Compression can cause you to need 15% to 20% more soil. On the flip side, the soil that comes with your plants (around the roots) will add volume. In any case, it never hurts to have a little extra potting soil on hand."

If 50lbs of soil is only filling a 50 L pot half way, IMO the soil is way too heavy.
I recommend you use something like this.

Soil is peat ewc n pearlite it’s fluffy as shit lol watched a vid saying to measure soil using a 1l jug so I have been and seems to add up to the statement on the bags too
So don’t understand why the 55 pot be half ful? Unless they account for extra room for lighter soils extra stones etc ?

Sorry misread your original post.

Maybe you got sent the wrong size pot. IMO a bigger pot means a bigger plant. Awfully hard to move 100L pot of wet soil though.

Hugo Phurst said:

Sorry misread your original post.

Maybe you got sent the wrong size pot. IMO a bigger pot means a bigger plant. Awfully hard to move 100L pot of wet soil though.

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Exactly why am asking lol there heavy as shit now if the soil measure was wrong then I need more soil no idea how much but there gona get heavy lol

All I know is a cubic foot is about 7 gallons. Merica

2cent said:

Exactly why am asking lol there heavy as shit now if the soil measure was wrong then I need more soil no idea how much but there gona get heavy lol

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Just out of curiousity, what are the dimensions of the pots?
eg. my 10 gal pots are 15.5in tall by 16in diameter & the 25 gal are 18in tall by 22.5in diameter.

Hugo Phurst said:

Just out of curiousity, what are the dimensions of the pots?
eg. my 10 gal pots are 15.5in tall by 16in diameter & the 25 gal are 18in tall by 22.5in diameter.

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450mm 450mm and 380mm high

They are all like that. Grow bags that are called one or number one or one gal. or one ga. or one gallon, are all larger than the hard plastic pots with holes in them which are also calles ones. The grow bags hold more volume. Like one other poster mentioned liquid and dry measure are different because of air space or you might say density but these aren't units. One cup could have more or less, you cannot pack or fluff a liquid. Mixing gravel and sand will reduce the overall volume. Not with liquid. They may usually hold more than 3,780 milliliters, unlike a can of soda pop or something. They all seem individual, no standard. More material than advertised in my experience. I could go now and actually measure but them being larger seems to be enough for me. I won't use smaller ones when I have larger ones (grow bags). Air pots and smart pots are cool too. I am not sure whether we or the plants really care all that much honestly bucket or bin paper or plastic.

2cent said:

450mm 450mm and 380mm high

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That's almost 77L or 20 Gal, guess that's why 50 L only half filled it.

A five gallon bucket of moist ewc is just over 25lb. It sounds as if your mix is twice as dense as straight castings? I'm s their a boulder in the bag?

Fallguy111 said:

A five gallon bucket of moist ewc is just over 25lb. It sounds as if your mix is twice as dense as straight castings? I'm s their a boulder in the bag?

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What ?
nah I baught 40litres ewc measured with 1l jug gave me 41 jugs of cast

2cent said:

What ?
nah I baught 40litres ewc measured with 1l jug gave me 41 jugs of cast

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His 50lb bag filled half of his 50l grow bag. IME about 30lbs of ewc will fill half of a 50l grow bag. That means his soil mix is twice the weight per volume of just castings. That seems heavy unless its being weighed fully saturated.