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Large pot volume
"Shepherd" wrote in message ... "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 Duh. It means they screwed up the sticker. JimS. Seattle |
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