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Helpful Hints
Compost Heaps & Bins
What is compost?
Compost is simply decomposed or rotted organic material. 'Organic'
means that the material was, at one stage, part of a living organism,
whether plant or animal.
Why should I compost?
- you can reduce by a half or more, the
volume of waste that you put out with your rubbish - this can
save you money.
- if everyone composted at home, the
amount of rubbish going to landfill would be reduced and there
would be less demand for opening new ones!
- composted organic waste is a very valuable
resource. It can be used to feed your garden, potted plants,
greenhouse plants, window-box flowers etc. It is also an excellent
soil conditioner that helps aerate the soil. This saves you money
as you don't need to buy compost.
- by using your own peat-free compost
in your garden, you are helping to save the last of Ireland's
bogs.
- compost heaps are homes for fascinating
wildlife, and can provide food for birds and hedgehogs.
So how do I do it?
It's dead easy. Just remember, composting is a natural process
and even if you do nothing more than dump your organic waste
in a heap, compost will simply happen! There are many different
composting methods and containers. These vary depending on your
needs and the amount and type of organic waste are composting.
For most people, the choice is between a composting cone and
a compost heap.
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Heaps
- Can deal with large volumes of waste.
- Best suited to large gardens with
enough space to make heaps
- Generate heat, which helps the composting
process.
- Usually wooden and so will need to
be replaced periodically.
- Work best when turned
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Cones
- Deal with smaller amounts of waste.
- Tidy and compact for smaller gardens.
- Don't heat up.
- Usually made of plastic and so have
a long life.
- Don't need to be turned
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Where can I get a compost heap/cone?
You can make a compost heap by simply piling up your organic
waste somewhere in your garden. To make things tidier, build
a container for the heap - you can use wooden pallets, bricks,
car tyres etc. Pre-made heaps are available from most garden
and DIY centres.
If you are going to use a cone, you can buy one from your local
authority or most garden and DIY centres. If you want, you can
make your own compost cone. Cut away the bottom of a dustbin,
turn it upside down and place on the ground. Ensure that the
bottom of the compost heap has contact with the soil so that
beneficial creatures of the soil have access.The bin will need
a lid to retain heat.
What can I put in my compost heap/cone?
Anything that was once alive or part of a living organism can
be composted. This includes wood, wool, leaves, vegetable peelings,
fruit skins, hair, cardboard, straw, fresh plants, grass clippings,
scrunched up paper..the list goes on!
Is there anything that I shouldn't
put on my compost heap/cone?
Materials such as glass, metal or plastics, cannot be composted
as these are synthetic.
Cat or dog faeces should also be avoided as these can contain
dangerous pathogens.
Adding coarse woody material and conifer hedge clippings will
significantly slow down the composting process. If you want to
add woody material, it is best to shred it first.
You should avoid adding meat, fish and any cooked foods
these tend to attract rodents and flies.
However, if you want to compost meat and cooked food remains,
then you can do this in a wormery More
information on wormeries
How is my organic waste turned into
compost?
The 'waste' that you put onto your compost heap/cone is food
for numerous creatures such as microscopic bacteria. These begin
the decomposition process and then other organisms such as worms,
millipedes and beetles continue the process until you are left
with a nutrient-rich compost.
Does it matter how much of the different
stuff I put in?
Yes, it is important to get roughly the right proportions of
different materials. Basically there are two types of materials
these are referred to 'greens' and 'browns'.
GREEN materials
are wet, soft, green and high in nitrogen.
BROWN
materials are dry, harder, absorbent and high in carbon.
You should aim for roughly three times the amount of browns as
greens in your compost heap/cone. This helps to keep the compost
moist but not too wet and also supplies your 'compost workers'
with essential nitrogen and carbon. (see below for list of GREEN
and BROWN materials)
| PLEASE ADD |
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DO NOT ADD |
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GREENS
- Grass cuttings
- Weeds/nettles (avoid weed seeds if
possible)
- Urine & manure
- Raw fruit and veg
- Fresh plants
- Tea leaves
- Seaweed, algae and garden pond cleanings
- Wood/peat ashes
BROWNS
- Straw and hay
- Coffee grounds
- Dry plant stems and twigs
- Scrunched up paper
- Torn up cardboard (e.g. from cereal
boxes, eggboxes, toiletroll centres etc.)
- Pet and human hair
- Egg shells
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- Meat or fish scraps
- Grease, oil, cooked food scraps
- Cat litter
- Dog or cat faeces
- Barbeque or coal ashes
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Will it smell bad?
No, not if you are adding the right things in roughly the right
proportion.
If there is an unpleasant smell coming from your compost heap/bin,
then it is either lacking air or it is too wet.You need to aerate
the heap and perhaps add some dry materials. To prevent this
from happening in the first place, add plenty of scrunched up
paper and torn cardboard as you go. This helps to get rid of
all of those envelopes, toilet roll centres, cereal boxes etc.
Also, especially if you have a compost heap, you should regularly
aerate your compost by turning it or loosening it with a fork.
What can I use the compost for?
Compost is an ideal, nutrient rich compost. It supplies plants
with nutrients, improves the structure of the soil and helps
it to retain more water. You can apply your compost as a surface
mulch to your vegetable or flower beds or use it as a top dressing
on your lawn, in tubs or containers. You can grow vegetables
directly on compost in raised vegetable beds.
How long does it take for the compost
to be ready to use?
The decomposition process is slow those micro-organisms
don't know anything about deadlines! You could be waiting for
up to two years for your compost. However, it will vary, depending
on what you are putting into your compost heap/bin.
Can I speed it up?
Yes. If you shred all the materials before you add them to your
compost heap, this will significantly speed the process. Even
if you just shred the larger, coarser material such as wood,
vegetable stalks and cardboard, the composting process will be
faster. Turning your heap or aerating your compost in your compost
bin will also speed it up.
If you have a good balance of GREEN and BROWN materials
which have been shredded and if the moisture and air content
is right, then your compost could be ready in about six months.
Is it worth bagging the compost?
Yes, this will help you to get a finer product. If you bag your
compost after about a year, it will continue to decompose in
the bag and become finer and drier. Anything too coarse in the
compost can be put back in the heap/bin.
Trouble-shooting
Why has my heap turned slimy?
The main culprit for slimy compost is grass. Don't add too much
grass clippings to your compost heap. Ideally, mow the lawn regularly
and leave the grass clippings on the lawn. They will be re-absorbed
into the soil and feed the fresh grass growth.
Alternatively, make cardboard mould:
make a stack of thin layers of grass clippings alternating with
flat cardboard. Leave this to compost, turn once the cardboard
has gone very soft, and use as a peat substitute.
I have a compost bin for over six
months now but I find that the dead flowers and vegetable trimmings
that I add still look the same. Why are they not decomposing?
Most likely this is because there is not enough water in the
bin for the 'compost-workers' to survive. Add some rainwater
from your water butt or leave the lid off during a shower of
rain.
Why does it take so long for my compost
bin to fill up?
This is because of the nature of the decomposition process. The
micro-organisms and other soil creatures that are breaking down
your organic waste and turning it into compost break down the
material into smaller and smaller particles. As a result, your
pile of waste will shrink as it decomposes and so it may take
longer than you would initially think to fill your bin.
Can I add meat to my compost heap?
No, this is generally not a good idea as it will tend to attract
rodents and flies. If you want to compost this type of waste,
try worm composting. More
information on wormeries
Why is my compost not like a garden-centre
bag of compost?
There may be a variety of reasons for this. One important factor
is the coarseness of the material that you add. If you add coarse
material, then your compost will be coarse. The best way to combat
this is to shred the coarse material before you add it to your
compost heap/bin. Another reason may be that the mix of materials
wasn't right. Perhaps your compost is a bit soggy, which would
suggest that you didn't add enough brown materials to the pile.
How do I make my compost more like
commercial compost?
Commercial compost is screened and sieved to make it fine and
uniform. You can sieve your own compost to improve its quality.
Return the twiggy and coarser material left in the sieve to your
compost heap/bin and work with the fine material that went through
the sieve.
I have lots of bugs and beetles in
my compost heap are these a problem?
No, these are the rightful inhabitants of your compost heap.
They are working diligently to help create compost from your
organic waste.
Do I need to turn my compost heap?
Ideally, yes. It speeds up the composting process by introducing
oxygen and mixing the materials. The resulting compost will be
more uniform. If you really don't want to or aren't able to turn
your heap, then mix the materials when you add them or at least
fork over the top layer to help the mix.
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