Large pot volume
"steve stidham" wrote in message
...
Debu, I saw a nice one at Costco a couple of weeks ago I saw only model a
clay pot with a dark green glaze. $45. Weighed about 40# empty. Better
pick-up an elephant to move it when it is full of soil.
"Debabrata Ghosh" wrote in message
om...
Cass wrote in message
. ..
Shepherd wrote:
Just bought several large pots to plant my bare-root roses in.
The tag states that the pot's soil volume is 0 quarts.
The pot measures about 19" X 19".
Can anyone please tell me what the volume of dirt I will need to buy
for
these pots?
So mathematically, I vote with Sameer, only because I did the numbers
the same way.
Let's see: you need to put some rocks or broken pots in the bottom for
drainage and to cover the drain holes; you don't fill all the way to
the top; the bareroot takes up some of the volume of pot; potting
soil,
while a tiny bit damp (if you're lucky), will reduce in volume several
inches once you water it.
My gut, however, tells me that a 2 cu ft. bag of soil would be almost
adequate once you add bone meal, a little alfalfa, and the rose.
Besides, no garden project would be complete without two, if not
three,
visits to the nursery. ;~)
Here is a little formula that works for me.
Measure the diameter of both the top and the bottom; let's say they
are D1 and D2 (in inches). Then, r1, r2 are radii (again in inches).
Measure the height of the pot, let's say it's x inches.
Define, h1 = x * r1 / (r1 - r2)
h2 = x * r2 / (r1 - r2)
Then, the volume of the pot in cubic inches is (volume of a cone):
(1/3) * pi * (r1 * r1 * h1 - r2 * r2 * h2)
Divide this by 1728 to get the volume in cubic feet (by about 230.67
to get it in gallons).
This over-estimates a bit if the pots are curved inwards, and, as
Cass said, you'd need to fill less in any case.
I agree with Bob, 19-21" ones aren't big enough. I am moving over my
favorite ones to 24" pots.
Bob, any idea where I can buy 30" pots?
Thanks,
Debu.
I want to thank every one for their answers about how much soil I need and
how to figure the amount, but can anyone please tell me what the volume = 0
quarts on the sticker means.
Thanks again,
Shepherd
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