Math Dilema!!!

I'm racking my brain with this and need some help, I bought 3 bags of FOFF 42.5L (38.6 dry quarts) each and a 4 cu ft bag of perlite. I need to fill up 9, 5 gallon pots (45 gallons total). I want to use all the soil so... How many parts soil to how many parts perlite do I mix? + Rep for all those who have a higher IQ than me!

2.13888889 cubic feet of perlite



At least that's what my math came up with.

I believe that it's a 2/1 ratio when worked out.

well... 4 cubic feet is about 102 quarts and there are 4 quarts in a gallon. 45 gallons x 4 = 180 quarts you need to fill your buckets. You have 38 quarts of soil and 102 quarts of perlite for a total of about 140 quarts. You would be 10 gallons from filling your buckets by this math. Also, you have a ratio of about 1 part soil and 2 parts perlite. Ideally you would want 2 parts soil and 1 part perlite or 3 parts soil 1 part perlite. I would buy about 3 times the soil you have if you only have 38 quarts and then mix 1/3 perlite with 2/3 soil leaving about half of your perlite leftover in the end.

2.13888889 cubic feet of perlite

Must be old math your using I got 2.13888887 LMAO

Cool

I came up with (38.6*3)/4=28.95 gallons of soil. (45-28.95)/28.95=0.55, which i figure means for every 1 part of soil I need a little over half a part of perlite... Please somebody tell me I'm retarded!

38.6 x 3=115.8/4=28.95 gallons of soil

4cuft=29.9220779gal

45-28.95=16.05 gal converted to cubic ft=2.14557292 cuft

Yep, 2/1

Use half of your perlite and you should be good.

my bad, didnt realize you meant 38 quarts in each bag hahaha... im definately high right now. 28.95/45= 64.33 percent soil and then you would have 16.05 gallons left to fill with perlite which means 16.05/45= 35.66 percent perlite. So using roughly 2 parts soil and one part perlite would translate to 66% soil and 33% perlite. You would use up all of your soil this way and a little more than half of your perlite.

slomoking13 said:

my bad, didnt realize you meant 38 quarts in each bag hahaha... im definately high right now. 28.95/45= 64.33 percent soil and then you would have 16.05 gallons left to fill with perlite which means 16.05/45= 35.66 percent perlite. So using roughly 2 parts soil and one part perlite would translate to 66% soil and 33% perlite. You would use up all of your soil this way and a little more than half of your perlite.

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the wrong answer and the stoner's answer are usually both wrong, but the stoner's answer is always funnier!!!

hey, got the job done and provided entertainment though.... what more could you ask for!? haha

always the ratio of perlite to soil stays the same you want amount vs. soil
50/50





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Pureblood89 said:

I came up with (38.6*3)/4=28.95 gallons of soil. (45-28.95)/28.95=0.55, which i figure means for every 1 part of soil I need a little over half a part of perlite... Please somebody tell me I'm retarded!

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You're Retarted, there I said it... LOL Just use the 3:1 ratio and you will be good... Nuff said... Over-engineering leads to heavy pot smoking... I know this from experience....