1) Trellis vines. An existing garden fence provides a trellis on which plants can grow. A trellis mounted on a wall can be made of renewable wood like bamboo.
Some trellises can be so beautiful that green growth on them is just an added bonus. In South Africa a group called Working for Water was felling alien trees which diminished our water supply. Black wattle and Port Jackson sticks were made into many great garden items including furniture and trellises. This would be a double service to the environment and surrounding yourself with calming green. You can also use second hand iron from metal dealers. I used reinforcing rods and wire to create a trellis over an ugly vibra-crete (concrete panel) wall, and grow beans. The foliage was attractive, the trellis a mere support. Wall space in a small urban garden represents a huge surface area you can use f
or growing, and it is usually forgotten, or attempts are made to camouflage the wall that do not make full use of its potential. Cucurbits, tomatoes, granadillas, grapes, Kiwi fruit and other fruit bearing vines, or even hops can be planted and trained over such a trellis. They can be perennial or annual.
2) Trellis fruit trees. Fruit trees can be trained to cover a wall and their branch patterns are part of the appeal of this form of horticulture. See links to pictures of how to train fruit trees at the bottom of the page under 'pictures of eco fences'.
3) Shelves. You can place shelves for your nursery or pot plants, especially if sunlight is at a premium in your garden, and the wall is one of the few sunny spots. They can be attached to the wall or hanging from chains or rope.
4) Pots. You can bracket pots to the wall permanently, or hang baskets against it, or holders that can allow pots to be changed, or place a frame in front of the wall to attach many pots for a vertical garden, or you can hang vertical garden pockets, like a shoe hanger, a fabric structure with multiple pockets in which plants can be grown.
5) Double wall. You can build another wall in front of the existing wall, half up, that creates a planter box.
Put up a lean-to greenhouse against the wall for growing in winter and warming your home with solar energy. It need only be a meter wide. See green houses on walls and fences in the link at bottom of page.
1) Stone dry wall
If you have stones in your garden, you can use them to build a wall that is part of your terracing, or a freestanding wall, with the gaps filled with concrete. The disadvantage is that a closed wall can dam up groundwater if it is a terrace wall, which exerts enormous pressure, and if it is over a certain height you need an engineer to design it. You can also build a dry wall that has no mortar in it as a terrace wall. I built a low dry wall in my garden. I stuffed the gaps with plastic bags, straw and clay, otherwise the water would just pour through. If you live in a wet climate this is not a bad thing. A dry stone wall creates a nice well drained microclimate above the wall and a more cool, most area at the base of the wall, where plants have a cool root run and profit from runoff when plants on the terrace are watered, and from the water condensing property of the stones.
2) Mud brick
there are beautiful traditional mud brick walls in our region. The wall is capped with a sloping roof and plastered to ward off the rain. Rocks and mud brick were both used to build the interior of the walls. If your climate is suitable and you have clay and local skills available it is a great choice as it has a zero carbon footprint compared to bricks, concrete, cut wood, metal and plastic.
3) Second hand
there are many second hand building materials available. My stone was on its way to the dump when I hijacked it and brought it home. Demolition companies have second hand bricks and other materials. Scrap metal dealers have a range of unused and used materials. This is where I bought the materials for the bean trellis on my back wall.
4) Recycled materials
There is a huge range of recycled material you can use to build walls and garden fences, from old bleached wood to used plastic bottles, broken bricks or cement shatter from your local city waste depot. I’ve seen a garden fence made out of metal sheeting that was a byproduct of an industrial process in which it was punched with large round holes. As my garden space is limited, I will refer you to collected pictures for the rest of the suggestions. See the bottom of the page.
You can build a green wall with plants. You can use the usual hedge plants like box or yew, depending on your area, but you can make the hedge multipurpose by planting flowering or fruiting trees trained into a hedge, as well as berries, herbs, or spice plants like laurel. You can also put up a wire garden fence or wooden fence that can serve as a trellis for fruiting vines like grenadilla, grape, kiwi, brambles blackberries and so forth.
You can build a garden fence with renewable organic materials, even alien woods that need to be removed from your area. There are beautiful woven fences which can be made from thin wands and sticks. Living willow or bamboo is also used.
You can stack your chopped wood, or logs, laying them flat on a woodpile that eventually forms a wall. The bonus of this idea is that it helps you dry excess wood, and you can add fresh wood at the one end and harvest from the other, it is gorgeous and acts as a giant insect and spider hotel. You don’t need to buy one and hang it up in your garden.
Gabions are wire cages in which rocks are piled to make a solid stable block or wall. If the rocks in your garden are too small to build drywalls, you can use gabions. They may require some skill and special equipment. I have seen these walls everywhere but never made one. Gabbions could also be made using rubble like broken bricks and cement shatter. You could even fill them with industrial waste, or plastic bottles. With careful material choices this very green solution may look lovely or interesting.They could also be filled with organic matter, chopped down logs, sticks, leaves or straw.
An extension of the idea of organic gabions. The containing wall could consist of a wire framework, or renewable woven garden fencing, or even palettes, or plastic or wooden crates. The double walls will need to be anchored to each other in order not to fall outwards when very full. Into the hollows you empty finely chopped garden waste and kitchen waste. Start at one end and then move slowly along as the wall fills. You can plant veggies in the mature compost, either on the top or sides of the wall, and set up a cyclical process for getting rid of all your organic waste. If there is enough dry brown material the kitchen waste will not make a smell or attract flies.
You can build a strong frame which supports a vertical garden on both sides for balance. As I’ve said above it can be made of buckets or pots hung on the wall, or pockets in a non rottable fabric, the construction possibilities are endless. At Kirstenbosch Botanical Garden there was one made of recycled plastic bottles used as planters, placed at 45 degrees.
I have used clear bottles hung vertically with a window cut out of them for planting into, but the best for looks is I think, hanging them sawn in half and hung neck down. The clear bottles soon go green with algae and give an overgrown hothouse feeling when the plants are trailing down a wall. Even an outdoor bookshelf with many pot plants on it will act as a visual screen.
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