Hey, another favorite topic!
with us being busy with urban permaculture here of course vertical gardening cant miss. most amsterdam people just have either a balcony or a little strip to the facade of their house. usually made by taking out a few tiles from the sidewalk. Lucky ones have a tiny backyard.
Together with Ishi Crosby (a Canadian teacher at the dutch permaculture schools) we're organizing a series of workshops around 'urban permaculture', and 'natural gardening with limited space'.
My favorite is the vertical garden design, shown at one course, which we immediately build. now two years later it has quadrupled the yield first gotten from that particular space. its a construction with a metal grid, that is strongly connected to the outside of the wall of your house (shed or wathever), at a distance of about 15cm.
at the inside of that grid we connect a piece of cloth like jute. this is to hold the soil together. the soil is added between the wall and the cloth.
You can either sow seed while filling it up with soil, using cloth with a rough structure like jute, seedlings will just grow through. we usually sprout inside and then put the seedlings in little holes we make in the cloth.
in the end a lot of things do well in this, most nightshades, tomatoes, peppers, paprika (bell pepper?) egg-plant. but also pumpkin, cucumber, courgette. and strawberries, dont forget strawberries. jummie.
And then there is another one, i already posted elsewhere, but i still like to share.
the vegg tower. for small gardens, roof tops, or big balconies. one of our teachers actually visioned a field of these towers because of their really high yield, we have been testing it for 1,5 year now and its still doing good. it has:
- a bigger soil volume then is possible with a raised be on the dame ground surface.
- a bigger planting surface then would be possible in a raised bed on the same spot.
- more different micro climates, sun, shade, half-half. just like a herb spiral.
- and it warms up a lot because of the stone. thus extending the season and protecting against frosts
it is build layer by layer, first a ring of bricks, which you immediately fill with soil. every layer of bricks is put half a brick inwards. this way you construct a very solid structure since the weight presses equally back everywhere...
you can start planting and sowing immediately when building.
it is especially handy in urban areas, but for any zone 1 it can increase yield, and also function like herb-spirals do. but because of the strong structure it can be build really tall, i've seen a few that were almost 2 meters high.