In this series we highlight useful plants that fit into permaculture systems. These systems work with the patterns in nature and provide a holistic and interconnected context.

For this profile we are showcasing stinging nettle, Urtica dioica is the native to San Diego County and Urtica urens is the naturalized species. Often called a nasty weed, this plant serves a specific beneficial purpose and provides super healthy and tasty food for hardly any work! What could be better!

The big downside of this plant is of course it stings like hell when it comes into contact with skin. The stinging normally does not last long, but reactions vary from person to person. Luckily, the stinging is pretty easily avoided by utilizing good gloves during harvesting.

The plants contain long, thin, hollow hairs that cover the majority of the stem and the underside of the leaves. Nettle stings contain acid (formic acid) but they also contain histamine and other chemicals. Luckily again, these chemicals become completely benign once the nettle is cooked.

Harvesting it pretty easy - just use scissors to cut near the base of the plant. Nettle is best harvested when young, before flowers and seed pods are formed. As a general rule I like harvest plants shorter than 1 foot tall. As the plant ages it gets more fibrous. It can get so fibrous that nettle is known for making fibers like yarn and fabric. And they don't sting!

Now that you have a nice big bag of fresh nettles it's time to cook or dry them. It can also be nice to harvest just a little bit to make fresh tea. For drying, is best to separate the leaves and dry in the sun or a dehydrator. For cooking, you can just throw them in the pan with little water, oil or butter - they can also be steamed. Cook and enjoy as you would spinach. They can be used in an infinite number of dishes - one of my favorites is pesto - just blend up the lightly cooked plant with garlic, pine nuts, lemon juice and sea salt, then toss with your favorite noodle.

Stinging nettle is not only an abundant free growing plant around the globe but it is also rich in vitamins A and C, iron, potassium, manganese, and calcium. (Gregory L. Tilford, Edible and Medicinal Plants of the West). Fresh leaves contain approximately 82.4% water, 17.6% dry matter, 5.5% protein, 0.7 to 3.3% fat, and 7.1% carbohydrates [Lutomski, Jerzy; Speichert, Henryk (1983). "Die Brennessel in Heilkunde und Ernährung". Pharmazie in unserer Zeit (in German)].

The plant spreads quickly by seed and also by rhizomes, and is often able to survive and re-establish quickly after fire or other disturbances. They are the exclusive larval food plant for several species of butterflies.

While this plant often gets a bad rap it proves itself to be highly tasty, nutritious, and functional - it is highly overlooked and underrated. When people talk about the "problem" of having to much nettle, the solution is simple, make pesto and share! 

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Around when I was born my father started an orchard on our land in backcountry San Diego County. Our Mediterranean climate is perfect for growing all kinds of amazing plants. However, our hard, compacted, clay soil filled with round rocks, makes for some challenging growing conditions.

He planted mostly stone fruit and citrus and, like most people, decided synthetic fertilizers would be the way to keep the plants happy and producing fruit. What he probably didn't know was that over time, synthetic fertilizers build up the amount of salts in the soil, one of plants worst enemies.

When salt dissolves in water, the ions separate and plants absorb the chloride ions. This makes it difficult for plats to uptake water creating drought-like conditions, even when ample water is present. Excessive sodium in the soil also obstructs the availability of important nutrients and kills beneficial soil microorganisms.

The downsides of synthetic fertilizers don't stop there. They can leach into streams, rivers, lakes and other bodies of water disrupt aquatic ecosystems and increase the nitrate levels of soil. Plants produced from such soil, upon consumption, convert to toxic nitrites in the intestines.

The list goes on, but lets try to focus on something a little more positive.

Over my years of studying permaculture I began to experiment with my dad's orchard, I wanted to see if ecological design could really beat the conventional agriculture methods of our modern society. First, I made sure no more synthetic fertilizers were applied. Then, I started adding compost and mulch, at least a few inches thick. I sprayed compost teas and beneficial fungal spores.

Next, I started to plant a lot more trees and really try to think about what cultivars would do best in this location. I had been observing the spot for years, now was the time to put that knowledge to use. I started to plant nitrogen fixing trees, why buy nitrogen when plants make it for free??? Palo verde, tipuana tipu, ice cream bean and guaje were some of my first perennial choices. I also wanted to get a lot more diversity in fruit and food without having to use much water in our dryland ecosystem. To reach that goal I planted loquats, pineapple guavas, kei apples, jujubes, grapes, moringas, pomegranates and more.

In the first year after ceasing to apply synthetic fertilizers fruit production declined and I thought this would be the case. Fruit production had already been declining, I could see trees were not happy and I had a good hunch it was due to salt build up. It was going to take at least a year to flush those salts out of the soil. To aide in this process, I applied gypsum to loosen the soil structure and allow water and nutrients to better move though the ground.

In the second year I started to see some exciting results. Tress were looking healthier, they were growing more, their leaves looked greener, more blossoms came out, and, there was more fruit! In fact, we had an old stone fruit tree, we didn't even remember what it was because it had been so long since it has produced fruit or even blossomed. This time, in the second year, it began to blossom, I was so excited. It was also not a colder-than-normal year so I was quite sure it was not just blooming because it was getting more chill hours. Finally, fruit begin to grow, it was a nectarine! Not very good tasting but a nectarine it was!

By the third year this tree had even more blossoms and more fruit, it was starting to taste good. Other trees followed suit. Our old tangerine tree had looked like it was dying, branches where turning brown and fruit production plummeted. This was a tree I was especially fond of as I remember stuffing myself of it's delicious fruit at a young age. In the the second and third years it started to produce more and more fruit. This year, the fourth, it's loaded! Branches have stopped dying and although it still looks like a very old tree, it seems happy again.

In time I will plant more and more trees in the orchard. My goal is to move it to be a regenerative system, a system that takes care of itself. I will have to continue to occasionally add compost to replenish some of the nutrients but for the most part I will not have to do much. I will slowly plant ground covers and smaller sized plants to maximize vertical space, like a food forest. Our previous blog explains food forests. 

The one thing my dad never did was spray chemicals, no herbicides, pesticides or fungicides. We never had serious problems with pests or diseases that we know of. I am happy to carry on that tradition and I know that moving this orchard towards a regenerative system will improve the health and resilience of plants there while in turn providing us with a greater and healthier bounty of food.

A food forest is pretty much what it sounds like, a forest of food. Sounds pretty great right. Who wouldn't want a forest of food??

A food forest consists of big trees, medium and small trees, shrubs, vines, herbaceous and ground covering plants. All the different sizes are planted in a way to produce food on multiple vertical levels, all within a single regenerative system whose goal is to take care of itself, with minimal work and outside inputs. The idea is to mimic a healthy old growth forest like we find in nature.

The image above gives you an idea of what the plants look like in a food forest system. One of the big goals is high diversity. This means planting as many species as possible in each size category. Each species has multiple functions. One tree species might provide shade, mulch, fruit and nitrogen for other plants. The more functions a species has, the more it is doing to be regenerative, and the less work you are doing! Regenerative means taking care of itself, like being self sustaining.

If we look at an old growth forest we can see a healthy regenerative system with plants of all different sizes. Mother nature is taking care of the system.  Nobody is watering, pruning, weeding, fertilizing or planting, yet it keeps growning and growing! 

Now lets imagine a traditional orchard or vegetable garden like we see below.

This vegetable garden is growing food on mostly one vertical layer, from just above the soil to about 2 feet above. Most of these plants are the same size. As vegetables are harvested from the garden we need to replace the nutrients that were carried away in the food, like nitrogen. Many people add synthetic fertilizers to accomplish this which can hurt the plants and soil in the long run. However, the easiest and healthiest way is to use high-quality compost. This garden also has bare soil so we are loosing water to evaporation and killing the healthy biology in the soil. Plus you have to replant everything each year! Now I'm not saying annual vegetables gardens like this are bad, but with a food forest you can grow more food with way less work.

Most of the plants we find in a food forest are perennial, meaning they keep growing year after year. This is great because unlike most vegetables you don't have to plant them year after year. Perennial plants, which include some vegetables, also grow much deeper roots enabling them to find far more water and nutrients deeper in the soil. This, in turn, means you don't have to provide them with as much water or nutrients.

In these pictures you can see there is so much growing on so many levels it is difficult to tell what's what! This is a very efficient use of space compared to the traditional orchard or garden bed we described earlier. 

By selecting just the right species for the right location you can mimic the old growth forest. For example, planting trees that produce dappled shade, a mix of shade and sun, allow other plants to grow underneath the tree's canopy. The light shading helps to reduce evaporation which can provide a lot of extra water for the system.

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Ecological design = any form of design that minimizes environmentally destructive impacts by integrating itself with living processes (Sim Van der Ryn and Stuart Cowan). Was popularized in 1971 by Ian McHarg in his book, Design with Nature. This book describes an ecologically sound approach to the planning and design of communities.

Permaculture = combines the words permanent agriculture and culture.. Coined by Bill Mollison and David Holmgren in 1978 based on the work by Masanobu Fukuoka, J. Russell Smith, P.A. Yeoman to simply be ethical, regenerative landscapes and food systems.

Here at Permasystems, we use the terms permaculture and ecological design interchangeably.

Work with nature, instead of against it

Permaculture is an ethical design system used as lens to view the world and a toolbox to develop and maintain regenerative systems. It focuses on using regenerative energies in the ways that nature already does and connects different disciplines, strategies and techniques. Permaculture works with, benefits, and extends the patterns of nature.

Ecological design and permaculture principles have been used by humans for thousands of years. Unfortunately, we have lost many of those skills that were being honed for eons. Now, we are seeing a resurgence of people bringing permaculture tools back and utilizing them for everything from growing food, to designing communities, managing waste, water and soil, building homes and other structures and much more.

To better understand permaculture, lets take a look at a healthy tree growing in the remote mountains. It grew from a seed. This tree gets water from precipitation, no hoses. This tree gets nutrients from the soil and air, no artificial fertilizers. Soil is built from the leaves that fall off of the tree, from dead branches that break down, from bacteria and fungi living in the soil creating nutrients for plants. Nothing extra is added! It is regenerative!
Now, look at a tree in your yard or neighborhood - how does it compare to our mountain tree? Is it regenerative? If not, how could we make it?


Permaculture can be used at any level, from your house, to your garden, to your neighborhood, to your to city, or beyond...

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