It is hotter than all get out here and we are not expecting a break or rain anytime soon. The ground is dry. Absolutely parched. What's a gardener to do? We water. Morning and night. Depending on what we believe about watering, we beat the sun getting up early or wait until it goes westward.
To care for ourselves in excessive heat, we are drinking copious amounts of fluids. That means we are also producing vast amounts of urine. And you know what they say, waste not want not. Turns out urine is a great fertilizer for the garden. So, piss on it!
The key to sustainable farming |
Healthy human urine is rich in nitrogen, potassium, and
phosphate, which are all essential for healthy plants. If you look at the
ingredients on a bag of chemical fertilizer, you’ll see the word “urea”, which
is present in, you guessed it, urine.
Collection is fun and easy. Pee in a bucket or jar. This easily
saves three gallons or more of water per flush. Use it fresh. Urine won't keep.
It will go bad. If it starts to smell, that’s ammonia cast off from nitrogen
breaking down.
It needs to be applied rather immediately (they say five minutes) pour your
donation into a gallon of water and head out to tend the garden. Urine contains
salt, making it a bit powerful to apply directly to plants. You'll have to dilute
the urine with grey water (any water that you have already used, like washing
up) at a ratio of 8 to 1. (Some say 3:1; others, 10:1) Just like gold, spread
the wealth around and just like a commercial fertilizer avoid applying every
time you water.
Feed hungry plants. The ones with high nitrogen
requirements - leafy greens, beets,
brussel sprouts, cauliflower, and broccoli. Avoid pouring urine on leaves. Water
at the roots. The urine needs to go into the soil around plants. If crops are
growing on the ground, water early
before fruit has set. If you use bottle-top
funnels to save water, the urine fertilizer would be best applied that way.
Our urine is full of useful chemicals like nitrogen,
potassium and phosphorus. Urine is 18% nitrogen, 2%
phosphorous, and 5% potassium, which is abbreviated as 18-2-5. These three
numbers give the percentage of the nitrogen, phosphorus, and potassium by
weight in the fertilizer. In other examples, fertilizer for roses is 18-24-16 and
for vegetables is 18-18-21. The nutritive content of urine is similar.
The use of urine to fertilize
crops has been practiced since ancient times, but is relatively rare today, “thanks
to the ick factor” and the prevalence of chemical and mineral fertilizers. But
really, what’s so icky about it. It’s not like I’m asking you to drink it. As
farmers and home growers seek healthier ways to grow food, urine is a viable solution.
If we find we are making more water than we can use in the garden,
urine also works as compost accelerator, weed killer, and is an excellent way
to keep critters like rabbits, deer, and squirrels out of the garden.
I’ve got you thinking, haven’t I? Here are a few of the
sources I found.
The definitive book on this subject is ‘Liquid Gold: The
Lore and Logic of Using Urine to Grow Plants’ by Carol Steinfeld
How does your garden grow?