I'm new here. I've been voraciously reading through the posts and am feeling pretty inspired. I thought it would be a good idea to ask a question about my first permaculture project on my new land.
Here's my place. We've had a bit of land excavated so that we could move our tiny trailer house onto the site.
I'm wondering what I should do with that big old clay bank behind my house. It's pretty steep and hard to walk up because the clay is dry and crumbly.
I would like to plant it up to stop it from eroding and it would also be nice to get some food growing on it.
My initial thoughts were to put in some dwarf fruittrees with a miniature retaining wall beneath each one. The retaining wall could be made from logs that we've got lying around the property. I'm not sure what I would do with the space between the tree's though. I feel that I would need to cover all the clay with something to stop it from eroding. A ground cover of some sort?
Any advice on what would work well in this situation?
I would terrace the land. Everything else is a menace. We did build retaining wall in a very simple way: Get railway sleepers (or any other suitable timber) and starposts, stack three sleepers or so and whack in the starposts, then fill with soil and compost. Without a terrace the soil will always go downwards, fertilizer and water too. If you want to harvest or prune it is not great either. I wouldn't make the terraces too wide and to high.
Congratulations on the new land and trailer house!
I would go with small swales on contour. Clay has low permeability, so getting the water to stay on the slope will help. You can set the overflow points (aka sills) progressively farther from the driveway so as each swale overflows, it fills the next. I would plant with pioneer species, like comfrey and black locust, and maybe some daikon radish to build organic content. Mix in a few annuals and experiment with what grows well in your zone. Chop and drop the pioneers and radish for a few years to build the soil both from above and below.
we have a similar horrible spot with awful soil on a steep slope. at the very top of the slope I planted a row of jerusalem artichokes. On a row about 1/3 of the way down, I planted a row of fig trees, then at about 2/3 of the way down I tilled up the top layer, mixed in some miracle grow, and I scattered out several hundred mixed varieties of sunflowers. This is new stuff. So long-term, I can't tell you whether it worked or not. we had some sunflowers. and we had some impressive looking jerusalem artichokes. the figs are too young to tell. But they're still alive. so that's a plus
Also, I've seen a peach tree (from a tossed pit) growing on a steep slope in Appalachia and happily bearing away.
I'd get all kinds of stuff going on that slope right away. I'd also skip the dwarf fruit trees and just plant a bunch of them from seed. The root systems are a lot more expansive that way. Yes, it takes longer - but some of the more precocious ones can start bearing in 3-5 years.
Swales are actually a good idea, i would combine them with terraces. I would not let the water run down from the roof directly, rather store it in a big water tank
and the overflow in the swale. Don't use a rain barrel it is useless you want at least 3000 litres even when your roof is small.
Location: Greybull WY north central WY zone 4 bordering on 3
posted 5 years ago
If gardening is your goal I would go with terraces because it is really nice to be able to pick stuff without having to bend over much or to be able to sit comfortably. I would avoid anything railroad tie though as that is adding things you don't want to your soil. Rock or used brick are often good sources for retaining walls. Piled carefully you often don't need mortar. Logs will also work if you have a source for fairly large ones.
Swales is the other best answer. Be sure you get the proper erosion control over flows in them so they don't wash as clay is bad about trapping water till overlfows then washing out. Work from the bottom up planting the swales so you have a sediment trap in your lowest, soonest, in the form of vegetation.
Beyond that your next best bet is to simple cover the hillside in vegetation. Start with a mix of seeds with grasses and some broad leafs. Mulch well and irrigate with tiny trickles of water or with a fine misting sprinkler run in very short bursts. If the water is running off you have run it to long. If you go this route I would build a low swale so you can catch soil that erodes so it doesn't run off.
Location: cool climate, Blue Mountains, Australia
posted 5 years ago
It seems that the steep hill is a sunny spot, maybe the best spot to grow something. You could also pack stones in wire mesh for the terraces.
First you build the wall and then you fill it. With earth and weeds and compost and the like.
I would second the earlier advice about avoiding railroad sleepers, ties, or anything else treated with creosote or tar or whatever, especially if you expect to be eating anything growing in proximity. Terraces are a great idea, though.
I would suggest looking into clumping (runnerless) bamboo species. As Geoff Lawton pointed out in his most recent video, they have dense, shallow root mats, and properly situated are ideal for trapping silt and soil carried away by rain. Properly situated, they will form terraces on their own, or a little faster with your help.
I would strongly suggest, even if you do bring in topsoil and amendments yourself, that you plant mulch species to work with your sediment traps. That way, you are creating a soil machine.
Also, hugelbeets with swales on the uphill side will help to retain water, and give you nice, deep soil in which to plant.
A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
-Robert A. Heinlein
She still doesn't approve of my superhero lifestyle. Or this shameless plug: