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Using urine as fertilizer in the garden – How to benefit from urea without peeing on lawns

Surprisingly, using human urine as fertilizer can help you work toward a closed-loop fertility system in the garden. Although this is not a plant-based technique per se, making your own urea provides a way for gardeners to recover nutrients from the food they consume. At the same time, divert the urine from the water system where it acts as a pollutant. So here is some surprising information that can help you fertilize your plants in a cost-effective and environmentally friendly way.

Why urine is suitable as fertilizer for plants

flowering plants and flowers thrive in a toilet bowl in the garden

Many gardeners are interested in being self-sufficient and living off their own skills and land. To cultivate a successful garden, people often need to add additional fertilizers such as compost to keep up with the demand for soil nutrients to grow plants. Store-bought produce and manure often contain waste products from other animals such as worms, chickens and even bats. What if you could produce your own endless and free supply by using urine as fertilizer?

gardener with protective masks as fertilizer urine and help the environment by energy saving solution without flushing

Despite its squeamishness about this bodily waste product, urine is clean in that it contains few bacterial contaminants. After all, urea comes from a natural source. According to researchers, liquid waste not only promotes plant growth as well as industrial mineral fertilizers, but would also save energy used for wastewater treatment. In addition, human urine could prove to be an effective and sustainable fertilizer for agriculture.

Scientifically proven nutrients in urea.

researcher investigates urine sample as a possible variant for fertilizing plants

The main components of commercial fertilizers, nitrogen, phosphorus and potassium, as well as micronutrients, are produced by the human body. In fact, humans have used urine to fertilize crops long before the invention of modern chemical fertilizers. Thus, urine is considered the original and free liquid gold. According to the Stockholm Environment Institute, one person can produce enough urine per year to fertilize 300-400 square meters of crops. Used at the household level, the urea produced by one family is more than enough to nourish a home garden. If applied on a large scale, the use of human urine as fertilizer could address both sanitation and food security challenges around the world.

test strips to examine urine as fertilizer for the garden


The high nitrogen content in urine is beneficial for plant growth . However, this can actually pose a major environmental hazard if urine enters public water systems through the toilet. After flushing, some of the nitrogen is removed in an energy-intensive denitrification process. The remaining nitrogen often enters natural water bodies, where it can upset ecosystems through a process known as eutrophication. The excess nitrogen causes increased growth of algae and aquatic plants. When these plants decay, it reduces the needed oxygen supply for aquatic animals, often causing their death. Therefore, it is preferable to pass the nutrients in the urine through terrestrial environments rather than aquatic environments. Thus, trees, perennials, wildflowers and lawns can be fertilized.

Nourish plants in the garden with urine as fertilizer

use of human urine as fertilizer for lettuce or other plants in the garden

The success of fertilizing your own garden crops with urea could have a positive impact on both global hunger and organic gardening. In many third world countries, manufactured fertilizers, both chemical and organic, are prohibitively expensive. In areas with poor soil conditions, using locally collected urine in the garden could easily and inexpensively improve crop yields. What are the benefits of using urine in the garden for the home gardener? Urine is 95 percent water. Dissolved in this water are trace amounts of vitamins and minerals necessary for plant health and growth. The important part, however, is the remaining five percent. These consist largely of a metabolic waste product called urea.

Tips for using goldenseal as a fertilizer.

hobby gardener and young mother fertilizing with urine in her own garden area with baby on her back


While urine is suitable as a fertilizer for plants, there are a few precautions you should take when doing so. Have you ever noticed the yellow spots on the lawn where the dog is constantly urinating? That’s nitrogen burn. Therefore, when you fertilize plants with it, you should always apply a solution of at least ten parts water to one part urine. Also, urea fertilizer should be absorbed into the soil as quickly as possible to avoid losing the gases it produces.

human urine as fertilizer inexpensive and environmentally friendly by sustainable solution for the garden

Water the garden area either before or after applying the natural fertilizer. You can also fertilize foliage of houseplants with urine, using it as a spray with a dilution of twenty parts water to one part urine. You already know what urea is and how your garden can benefit from it. So are you ready to experiment? Consider this option once you get past the “Ick” factor. Urine can be an effective and economically efficient tool in the garden to increase production organically.