A five-eighths, three-frequency icosahedron greenhouse for £30
Here is the completed dome, covered with polythene, bubblewrap, old tent, large dog-food bags and industrial clingfilm, mostly from recycled sources.
Currently it is growing melons, squash, cucumber and basil. On a sunny afternoon I have seen the temperature inside at 46 degrees plus.
|I used a small brick, acrylic filler gun and stapler to fix the struts inside the connectors||The first bit was easy but it soon|
|turned into a jumble of sticks that had me pulling my hair out.||Once I started using supports stuck into the ground the dome stopped moving around and I began to see the shape|
|Crawling in and out of the triangles was certainly good exercise||Finally the basic geodesic structure was complete|
|But then I had to move it to another part of the garden. The ‘roof’ needed additional support and I lashed more bits of bamboo to the structure at the top.||I used all of the old polythene and bubblewrap I could find around the place, stapling it onto the struts. I also left a window in the roof to decrease humidity.|
I put the greenhouse dome on top of some old slabs of concrete from a garage and these seem to work superbly as a heat sink. Since the structure sags slightly under its own weight, due to the flexibility in the hosepipe connectors, I wrapped it round the middle with several layers of industrial cling film for support, this seems to have done the trick.
It is certainly warmer in there than in our more traditional greenhouse. I realise this is a ‘bender’ of a greenhouse, but as this section of the garden is not overlooked it is perfectly acceptable. At dusk it sometimes looks as if a spaceship has landed in the garden. The plants need watering pretty much every day and I have never harvested so much basil in my life. I am very excited about my first melon.
Now it is a bit of a leap from a simple icosahedron to a 3 frequency, and in some ways I wish I had made this one as a 2 frequency dome – it did take a lot of time to make (and move) the structure. So for my next geodesic DIY greenhouse I want to make a 2 frequency dome with a more rigid framework.