
User’s Guide
T
he following guidelines will help you have compost within four
to six weeks. This process allows you to gradually fill your Back
Porch ComposTumbler with common organic kitchen throw-outs as
well as yard and garden waste. The speed at which these materials
compost is dependent upon the carbon/nitrogen content of the
materials, their size, the moisture of the materials, and how often
you turn the drum.
Composting Tips
The ratio of materials you put into your unit will affect the
amount of time it takes to make compost. You must always use
a combination of fresh green and dead brown materials, and
the volume of green should be equal to or greater than the
brown. Adding more green materials to the drum can speed up
your composting time but you should not exceed a 75/25 percent mix of green material to brown material.
Use garden waste and plant or grass trimmings within two to
three days of cutting or they will not have enough nitrogen left
to be useful as a fresh green source. If you use dead grass as a
source of carbon, try to include another brown material along
with it. Dead grass is very low in carbon and may not be sufficient by itself. For other carbon/brown sources please see the
list below.
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✔ Fruit peels
✔ Vegetable peels
✔ Coffee grounds & filters
✔ Tea bags
✔ Egg shells
✔ Peanut shells
✔ Garden waste
✔ Plant trimmings
✔ Fresh grass clippings
✔ Hair trimmings
✔ Leaves (dry)
✔ Dry grass
✔ Dead garden waste
✔ Straw
✔ Sawdust
✔ Wood ashes (cold)
✔ Tissue Paper
✔ B/W Newspaper
✔ Paper and cartons
✔ Egg cartons
Green Material
(Nitrogen)
Brown Material
(Carbon)
What To Compost
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Do Not Put These Materials
In Your ComposTumbler
Meat
Fish
Dairy products
Sauces
Oil
Fat
Pet waste
Diseased plants
Seedling weeds
Bones
It is not required that you chop or shred the materials you
put into your Back Porch ComposTumbler. However, if you
don’t, you can expect the materials to take considerably longer
to compost. The smaller the materials, the faster they will
decompose in the composting process.
It is important to remember to keep the balance between
green and brown materials to at least a 50/50 percent mix. If
you add a bag full of green kitchen throw outs you should add
some brown material. This balance is an integral factor in the
composting process.
If you are adding equal, small amounts of throw outs your unit
may not fill up but rather become your bottomless garbage
pail. However, if your unit does fill up or if you want to get finished compost before it fills up, it is necessary to stop adding
materials so that the unit can finish off the existing materials.
The time it takes for the load to finish is dependent upon the
green/brown ratio you have been maintaining, the volume of
the material in the unit, whether you have been chopping up
the materials before adding them, and the moisture content of
the materials. Your load could take between four to six weeks
to finish from that point.
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Balance of Green and
Brown Materials
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You should go out to your Tumbler about three or four times
per week to check the moisture, the smell of the materials, and
to turn the drum. You will likely be out there that many times
to add materials anyway, so it is a perfect time to check its
progress and give it four to five easy spins.
The materials should be moist enough that they clump together when you squeeze them. If they are not you need to add a
little water. If you squeeze them and water comes out, your
materials are too moist and you should add some brown material. Additionally, if the unit has a foul smell to it, similar to
ammonia, then you have too much green material and need to
add some more brown.
The Back Porch ComposTumbler is specially designed to
ensure the proper mixing of materials and air. You should give
your unit four to five easy spins at least three times a week to
keep the materials mixed. This will keep the composting
process moving. The best time to do this is after you add materials and check the moisture and smell. This way you can do
everything you need to do in one trip which makes using this
unit even more convenient than other methods.
Always make sure that when you are done turning the unit the
aerator is facing down and the door is at the top of the unit.
This will allow any excess moisture to drain out through the
bottom and will help you prevent getting odors in the unit.
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• Put your fingers into the deep grooves
• Push down with your bottom hand
• Use your top hand to give the drum
turning momentum
• Turn it about 5 complete revolutions
at least 3–4 times a week
• Be sure the aerator is facing down and
the door is on the top when finished turning
Turning Your Back Porch
ComposTumbler
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Hint, you can collect any excess moisture that drains out of the unit
and dilute it with 10 parts water to 1 part liquid and have a wonderful fertilizer for your plants-we like to call it compost tea!

Your Back Porch ComposTumbler is designed to be a bottomless garbage pail but in order to get a full load of finished compost you need to stop adding materials for a few weeks to finish off the existing materials. All you need to do during this
period is monitor your moisture, smell, and give the unit a few
spins three to four times per week and in four to six weeks you
will have a finished load of compost.
There are three major signs that your compost is finished or
near completion.
• The first is a major loss of volume of the materials in your
unit. Typically, if you are not adding large volumes of
material at one time, your volume will drop by nearly 50
percent when it is done.
• The color is another
indicator that the
materials are done
composting. When
they turn to a dark
brown or black
color they are
finished.
• Finally, when your
compost has an
earthy, wet mulch
smell it is done.
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How To Know When Your
Compost Is Done

5-Year Warranty
The Back Porch ComposTumbler®is warranted against
any manufacturer’s defects in materials or workmanship
for 5 years from the date of delivery. We will replace any
defective part, or the entire unit if necessary, at our
expense. This warranty is given only to the original purchaser and is not transferable, nor does it apply to damage
caused by misuse.
This warranty gives you specific legal rights and you
may also have other rights which vary from state to state.