
WHY FISH AND SEAWEED PRODUCTS?
As you may know fish emulsion, fish meal,
seaweed/kelp meal, and liquid seaweed/kelp are
some of the most powerful natural fertilizers and
soil amendments in the world.
NOTE: For those organic gardeners who prefer vegetarian
soil amendments,
you can skip the fishy ingredients, it's not
necessary. There is plenty of NPK in alfalfa meal
and other grains that you can use.
- Most commercial fish emulsions are rated NPK = 5-1-1.
- Most commercial liquid seaweed sprays are rated NPK = 0-0-1.
Even though these NPK ratings to a novice may
seem low, there are lots of important trace
elements, growth hormones, disease control, and
organic matter in these products.
Fish Emulsion is mainly used for its quick high
organic nitrogen and available soluble P and K
benefits as a foliar feed. Fish Meal is mainly a
great soil conditioner and great bacterial food to
help feed the soil microherd. Even though there
may be 4-5% organic N, 1% soluble P, and 1%
soluble K in fish emulsion, there may be up to
6-8% total N, and 2-3% total insoluble P or K in
it, that gets broken down later by the soil
microherd. Most commercial fish products are made
from the trash products of the menhaden fish. This
fish is a relative of the herring, sardine, and
anchovy fishes. Most commercial fish emulsions
contain up to 5% sulfuric acid in order to
preserve the fertilizer on the shelf, but also it
supplies needed sulfur to the plant and soil. Most
economical fish products do not contain any fish
oils in it, which supply extra beneficial soil
fungi. Most also do not contain much fish bones
which supply extra calcium.
Seaweed/Kelp has a low NPK = 0-0-1. However,
just like the fish products and all other natural
fertilizers, there are more insoluble NPK
nutrients and other trace elements in the product
than meets the eyes. There may be up to 1-3% total
N, 1-2% total insoluble P, 3-5% total insoluble K
in seaweed products. The real benefit of seaweed
is not in its NPK amounts. Seaweed/kelp can
contain 60 trace elements, many growth hormones,
and disease control properties in it! Basically
every nutrient that any surface plant can ever
need! If seaweed products are mixed with high N
products like fish, you have an excellent complete
natural fertilizer and soil amendment that will
supply every NPK and trace element need of the
soil and plant. Seaweed and other algae plants are
some of the most powerful plants on earth, or
should I say in the ocean. Seaweed is also an
excellent food source for beneficial fungi in the
soil.
WHY MAKE IT HOMEMADE INSTEAD OF BUYING IT COMMERCIALLY?
- It's cheaper to make most natural fertilizers and soil amendments in large
quantities.
- There are some nutrients that you get from homemade versions that are not
in most commercial brands. For example, commercial fish emulsion since it
is processed from trash fish, will have less fish oil, fish bones, and
proteins than fresh fish parts or canned fish in a homemade brew.
- Aerobic bacteria and fungi are essential to hot composting, disease control,
and soil health. In commercial fish emulusions there no little to no aerobic
bacteria in the containers. If there were any growing and living in the
containers, the bottles would explode on the shelves! Homemade brews always
will contain more beneficial microherd than most commercial brands.
HOW DO I MAKE A HOMEMADE BATCH OF FISH/SEAWEED EMULSION?
You can use the following suggestions to the
other suggestions in the Organic Gardening forum
FAQ's on Compost Tea recipes when you brew these
fish/seaweed foliar sprays or soil drenches. You
can use fresh fish parts or any cheap canned fish.
The juices, sauces, or oils in the can can be used
to breed beneficial microbes and supply extra
proteins in the tea, so use it. (NOTE:
If you use canned fish products, you may
want to let it decompose mixed with some finished
compost, good garden soil, etc. in a separate
closeable container for a few days before using.
Since most canned meat products contain
preservatives, this will guarantee that the good
microbes in the tea will not be killed off or
harmed in brew making.)
You can use any fresh or dried seaweed. Fresh
seaweed has more N in it, but that really isn't
important for seaweed teas. You can buy fresh or
dried seaweed at most oriental grocery stores.
Seaweed decomposes better if chopped up or
liquified first in water before brewing.
If you are using fresh fish, you need to
compost it separately in a 5 gallon closeable
bucket. Fill bucket 1/2 full with extra browns
like sawdust, leaves, or straw. You can add
molasses to the fishy mixture in order to build up
microbes in order to speed up decomposition. The
sugars will also help control odors too. Open the
bucket and stir the fishy paste daily or every
other day in order to get air in the mix for
better decomposition and better aerobic microbial
growth in the emulsion. Let this paste rot for at
least 1-2 weeks. The browns help control offensive
odors and absorb organic nitrogen from the fish so
that it is not leached out or evaporated.
Since commercial fish emulsions contain sulfur
in the form of sulfuric acid, if you like you
could add 1-2 tblsp of Epsom salt to the mix for
extra magnesium and sulfur. Or to mimic the
acidity of sulfuric acid and add extra trace
elements you could add 1-2 tblsp of apple cider
vinegar to the mix. NOTE: Recent
studies have shown that unsulfured molasses or dry
molasses powder is best for faster microbial
growth in tea brewing.
You can now safely take the decomposed fish
paste from the 5 gallon bucket and add it to your
regular hot composting piles or add it to your
special compost tea recipes. The more vegetable or
fruity organic matter that you add to fishy
compost the better you remove the offensive smells
and the more trace elements you add to your
compost and teas. This of course is optional.
You can add molasses or brown sugar to your
teas also. Sugars are high carbon substances that
not only can cause speedy microbial growth, but
also sugars are an excellent natural deodorizer.
At this point you may want to decide whether
you want to make a simple tea or an aerobic
aerated tea for your needs.
When you make fishy tea, you need to add the
seaweed at brewing time. Let it brew for at least
1 week, stirring every few days. If you decide to
brew it aerobically with an air pump, try up to 3
days, or until the brew has a "yeasty" smell, or
has a foamy top layer on the tea. You can
apply this fish/seaweed emulsion at a dilution
rate from 1:1 to 1:5 ratio (5 gallons of tea to 25
gallons of water).
If you like, you can add a few drops of mild
liquid soap per gallon as a wetting agent to get
better coverage as a foliar feed at application
time. (NOTE: If you are concerrned that using
soaps may harm the beneficial microbes in your
teas, you may want to just use liquid molasses,
dry molasses powder, fish oil, or yucca extract as
a spreader-sticker.) You can use this tea as a
foliar feed or as a soil drench or both. Soil
drenches are best for building up the soil
microbial activities and supplying lots of
beneficial soluble NPK to the plant's root system
and the topsoil texture. Foliar feeds are best for
quick fixes of trace elements and small portions
of other soluble nutrients into the plant through
its leaves. Foliar feeds are also good for plant
disease control. Foliar feeds work best when used
with soil drenches or with lots of organic mulches
around plants. You can poke holes in the soil
around crop roots with your spade fork, to get
more oxygen in the soil to further increase
organic matter decomposition and increase
microbial activity in the soil.
Remember all your homemade fertilizers and soil
amendments can be as diverse and unique as you
are. So have fun and keep composting! Happy
Gardening!
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