Weights of different mixes

goldfinchyAugust 13, 2012

Hi all,

I posted this question in a different thread first but was advised to separated it.

I am considering a 5-1-1 or a gritty mix (or some variation) for large containers.

I would like to move the planters from time to time and am curious about the weights of the mixes.

Can anybody post weights of 1 gallon (or a liter or 4 liters to compare with a gallon) of different mixes, please?

For example:

1) 5-1-1

1 gallon ..... lbs (kg)


5 parts Orchid Bark (pine bark fines), 1-2 parts Perlite, and 1 part Peat Moss

2) gritty mix

1 gallon .... lbs (kg)

1 part uncomposted screened pine or fir bark (1/8-1/4"), 1 part screened Turface, 1 part crushed Gran-I-Grit (grower size), 1 Tbsp gypsum per gallon of soil

If you have your other favorite mix, please post it too!


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tapla (mid-MI z5b-6a)

Realistic guesstimates:

Well-made 5:1:1 mix weighs about the same as a peat-based mix when dry and about 2/3 the weight of most peat-based mixes at container capacity (fully saturated).

A well-made gritty mix weighs about 2-3X as much as a peat-based soil when dry, and about 1.5X as much at container capacity.


    Bookmark   August 13, 2012 at 3:39PM
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dickiefickle(5B Dousman,Wi.)

Water weighs 8.3 pounds per gallon ,if you plan to water the mix.

    Bookmark   August 13, 2012 at 3:53PM
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that's a very good point! I forgot about the water :)

Al, thanks for the guesstimate! Now, I need to get the weight of the peat-based mix. I have a Cactus mix, will try that.

    Bookmark   August 13, 2012 at 6:04PM
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