I've been tossing around the word 'permaculture' to describe some of the activities Anthony and I are engaged in here on the suburban farmstead. As it's not a mainstream way of gardening (or way of life) yet, I thought it might be helpful to define it.
Permaculture is a portmanteau for the words "permanent" and "agriculture." The idea begins with the conviction that modern humans are not growing things on this planet in a permanently sustainable manner. Especially since the advent of fossil fuel technology and its resultant slew of fertilizers, soil amendments, and chemicals meant to kill off insect pests, we've been poisoning the environment, depleting the soil, and destroying our water supplies. The problems continue with practices like monocropping, or growing large tracts of nothing but one plant, aggressive tilling of the soil, and letting farmland lie fallow and sterile, without putting anything back in during the seasons it's not in use to grow food.
I first heard of permaculture when I lived in the Pacific Northwest, where it's a bit of a buzzword. Somewhat ironically, however, it wasn't until I moved back to the Midwest that I began to practice it in earnest.
I say 'somewhat' because it's not as if people in the Midwest aren't doing permaculture. There's Midwest Permaculture Center in my neighboring state of Illinois, and some folks here have been effectively practicing permaculture all their lives and just haven't ever labeled it as such. One of the best permaculture solutions I've ever encountered - a super-smart, inexpensive, completely non-toxic method for combatting cedar rust - came from a fellow Missourian.
So, OK, I've outlined the practices that permaculture is calling out as wrongheaded. But what do we do instead?
As it turns out, a whole host of things, and most of these things are very ecosystem-specific. What I've learned in my four years' deep dive into all things permaculture is that you have to adapt and tailor it to your situation, your home, your region, your weather systems, soil type, etc., etc. But that said, there are some universal takeaways. I'll touch on them here, with some book recommendations embedded for your further exploration.
We seem to be coming to a consensus that the earth beneath our feet is the key to everything. I've talked about the soil before when I gave some tips on sheet-mulching. But I'm learning new, exciting facts about dirt all the time! Just last week, it was that the fungus-to-bacteria ratio in your soil could be a much better method for judging soil quality than the mainstream practice of assessing ratios of nitrogen, phosphorous, and potassium (the ol' NPK metric) and amending the soil accordingly. But don't let that science-y tone put you off, as the F:B ratio thing is really pretty simple: For more fungal activity, you want to use a mulch that promotes mycorrhizal growth, such as wood chips. For more bacteria, you'd use compost. Brassicas and mustard like much more bacterial activity, and most vegetables like a slightly more balanced ratio of 3 fungal to 4 bacterial.
I guess the key takeaway is that permaculturists look for ways to improve the soil that mimic natural systems. When I'm hiking through the forest, I see a layer of dead leaves each fall that decompose, feeding the forest trees and plants. No one comes through and tills the soil. The forest is a healthy ecosystem. While we can't grow most food plants in a regular deciduous forest, we can mimic natural systems with thick mulches that replenish the soil, plants that are grown solely for the purpose of feeding the soil and/or chopped to "mulch in place," and layers of plantings that harness the power of a forest but focus on food we humans can eat, hence the term "food forest."
For an excellent introduction to soil, read Toby Hemenway's Gaia's Garden: A Guide to Home-Scale Permaculture. While I don't agree with his stance on native plants, the symphonic description of soil bowled me over.
The best permaculturists use many native plants, as natives have evolved over millennia along with beneficial, native insects to exist in the given environment without a lot of human intervention. Now, there are permaculture practitioners who advocate the use of some exotic invasive plants, but I am not in that camp. To my thinking, the benefits of any particular invasive are far outweighed by the potential damage that invasives can do. Since invasives can easily spread through seed carriage from birds and animals, to me it seems irresponsible to use invasive plants (sort of like second-hand smoke). There's always a native or at least non-invasive introduced plant alternative that will accomplish the same thing anyway.
Of all the plants we've grown, the native trees, shrubs, grasses, and flowers are by far the easiest. You don't need to do anything to amend the soil, nor do you need to till it. Just put in the plant, or sow the seed, and you've got fairly instant success - though patience is key, as natives grow by the rhythm, 'first year sleep, second year creep, third year leap.' Many natives are edible and medicinal, too. We've used that criteria for selecting our natives and have never been at a loss. Our native food/medicinal plants include paw paw and persimmon trees, violets, blueberries, blackberries, plums, cedar berries, hibiscus, passionflower, sunflowers, echinacea, rudbeckia, hyssop, New Jersey tea, chokecherry, serviceberry, and more.
If they aren't edible or medicinal, they're at least host plants for beneficial pollinators and other wildlife, such as our sycamore, tulip, and black gum trees, as well as our native violet ground cover.
Though he doesn't call himself a permaculturist, and he has less of a focus on edible/human use plants than I'd like, Doug Tallamy is a leading advocate for native plant gardening. His book Bringing Nature Home is a must-read.
Canopy Layers and Polyculture Guilds
Speaking in terms of that hike through the forest I mentioned earlier, the other thing we notice is that plants grow in distinct canopy layers. First, there are roots, tubers, bulbs, and rhizomes growing into the dirt, followed by low ground covers colonizing the soil surface. Next are knee-high plants and grasses, followed by shrubs and small trees in the understory. Finally, tall trees make up the canopy overhead. Permaculturists mimic the layering found in nature by designing gardens in the same way.
For example, in our garden, we've planted (or simply encouraged) the aforementioned sycamore, black gum, and tulip trees for the high canopy, and they're joined by a Shumard oak, Eastern red cedars, and several persimmons. Next is the understory, made up of paw paws, serviceberry, an old lilac, a rose bush, and fruit trees. Next are blackberry vines, blueberry and gooseberry shrubs, elderberries, chokecherry and serviceberry trees, hazelnuts, witch hazel, and others. Then down to the perennial vegetables asparagus, rhubarb, and horseradish, as well as annual vegetables. Finally, we have a ground cover of violets and geraniums, as well as plants with edible roots.
Polyculture guilds are more complex, but the one everyone references first is the three sisters: squash, corn, and beans. The point is that the three plants are interdependent. Corn provides a trellis for beans, beans provide nitrogen to the corn, and squash shades the soil over their roots. In our garden, we've created fruit tree guilds with, for example, alliums, witch hazel, evening primrose, borage, and other plants interplanted in the orchard. You might also think of simple companion planting, such as peas, lettuce, carrots, and beets planted in proximity to support each other. We planted an oak where its leaves will fall on a bed of blueberry bushes, the acidic oak leaves providing a natural mulch for acid-loving blueberries, and we won't even have to rake them into place!
Sepp Holzer's Permaculture: A Practical Guide to Small-Scale, Integrative Farming and Gardening is kind of the bible of permaculture, or one of them, anyway, and it's a great read. I highly recommend it.
Permaculture encompasses more than gardening as well - it's a whole way of life. I'll tackle other permaculture aspects in a future post, but I hope for now you're excited to dive in, checking out some of the books above. Also want to shout out to my online permaculture community, Permies.com, where you can discuss these topics with likeminded folk. It's been a great resource for me. And if you're in the St. Louis area, I recommend checking out the tremendous offerings from Gateway Greening - from low-cost seeds to a handy planting calendar to helpful how-to videos. Welcome to permaculture!