Solar Greenhouse – Detached or Attached?
Tuesday, September 29th, 2009When I bought my house, it was an upside-down T, with the stem facing southwest. In last week’s post, I talked about installing sunny windows in the southeast and southwest walls for passive solar daytime heating. Now I was trying to decide how to further remodel for more solar gain.

I could have added a greenhouse on the southeast corner adjacent to the kitchen. This was very appealing as far as harvesting food and herbs. I’d also envisioned it as a sitting area, the breakfast nook, I suppose. But I enjoyed the new windows, and one was in my bedroom. I’d have missed that if it went into a greenhouse instead of to the moon, trees and coyotes.
The warmest winter sun hit the southwest corner, so I decided to add something there. I wasn’t sure what, but many pencils and eraser goobers later, I came up with this plan. Craig Simmons of Eco Builders fleshed out the details for me.
I was content enough with the heat produced through the new windows that I put these drawings away. I was also a working single mom of two young girls, and my time constraints prevented me from doing a lot of research into this project, never mind starting and completing it! I rolled up the drawings and propped them up on my desk.
In 1997, I lived in an old block home on an irrigated acre of land in Ojo Caliente – almost the adobe dream home! I was more interested in the land than the house, and we cultivated half of it with beans, corn, tomatoes, squash, herbs and flowers that we sold to friends and co-workers.
Out near the garden, there was a small frame greenhouse with translucent polycarbonate walls. I checked the overnight temperature in early spring to see if I could start my seeds in it. It was too cold, since it was not heated or insulated. It was essentially a cold frame with an 8-foot ceiling and roof.
I started researching greenhouses and was disappointed to find all standard greenhouses need supplemental heat. This is usually generated with electric heaters for something as small as I was looking at. Aside from growing food to eat healthy, cost needs to be taken into consideration. Heating a non-insulated building of plastic walls with electricity was not cost-effective.
I came across the Growing DomeR Greenhouse in a gardening magazine. It is still available, and I see them popping up across the landscape as food and energy costs rise. This is a passive solar, geodesic design with glazing on the south side and insulated solid walls on the north side. Planting beds and the concrete slab floor are the thermal mass, along with a pond. Do you remember the 55-gallon drums in the solar pods? Poisson knew water is one of the best materials for thermal mass. It must be sized properly so it can radiate heat effectively. The pond can hold fish or water plants, or boards can be placed across it to make more room for container plants.
The combination of masses in this greenhouse meant no supplemental heat. It was an environment that took care of itself – an ecosystem of sorts. I was sold on it immediately!
For a variety of reasons, though, I didn’t purchase one at the time, but this is the only greenhouse I recommend to anyone. It needs no extra heat, and the larger ones double as a small living space as well.
Ten years later, it is spring 2007, and I want to start my vegetables from seed. I am toying with the idea of buying a 12′ diameter dome greenhouse and putting it about 100′ from the house down the hill on my property. This is a sweet, quiet, sunny spot with completely different views and feel than the house. A few cottonwoods along the irrigation ditch give the space a cozy feel and summer shade. A passive solar greenhouse here would be an excellent get-away.
As I walked the land, I began to picture it. I imagined bringing in electricity and water, and building a path of crusher fines between the greenhouse, the house and the garden. I considered views, sun, neighbors and the heat the greenhouse would produce. I wanted to somehow move the extra heat back up to the house in winter. I thought of underground ductwork, insulation, fans….. My little greenhouse project was getting complicated, the kind a contractor would balk at.
In a split second, like the cartoon cliche of a light bulb going off over your head, my face went from bewilderment to wonderment and glee! I decided to build an attached passive solar greenhouse for heat and food. Remember the mention of this book??
I dusted off my original vision and the drawings Craig and I had worked on a few years before.
More info about:
Growing DomeR Greenhouse http://www.geodesic-greenhouse-kits.com/
Craig Simmons, Eco Builders http://www.ecobuilderstaos.com/
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You need to start thinking about preservation. Knowing how to make your fruits and vegetables last is a crucial skill for any home gardener.
Also, a lot of vegetables will need to undergo a quick process called blanching before you throw them in the freezer. Blanching is a cooking technique in which you scald the vegetables in a pot of boiling water and then put it in cold water immediately after. This stops the production of enzymes which might otherwise cause the produce to continue growing and develop a strange taste in the freezer. ![Reblog this post [with Zemanta]](http://img.zemanta.com/reblog_e.png?x-id=add691da-4387-463c-990a-f56e8d5f1cef)
On a winter field trip, our Soils class visited Solar Survival in Harrisville, NH. This was the home and lab of Leandre and Gretchen Poisson, authors of ‘Solar Gardening: Growing Vegetables Year-Round the American Intensive Way.’ They grew food all winter in frigid, frozen, snowed-in northern New England using solar pods, which they developed.
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to spend a significant amount of time and money to establish the organic integrity of your goods. It’s not easy to become a certified organic supplier, and those who attain this status certainly deserve ample compensation for their efforts.
ensive to purchase, but easy to grow. You can also plant all kinds of veggies in containers and have a healthy harvest of lettuce, spinach, tomatoes and other food all summer. If you have the space for a large garden, just go for it! Growing food is one of the most satisfying things you can do, and when you harvest the fruits of your labors, you’ll have the satisfaction of knowing your food is truly organic.
markets or via a farm stand, and will instead participate in a CSA. By purchasing a share in a CSA, you show your financial support to a farmer, and they use your money to grow food all season. Each week you’re rewarded with a ’share’ of the farm’s crops, and the farmer is able to feed their community without breaking the bank. Again, when purchasing food direct from a farm, you may not always get organic goods, but you buy food grown in your community and invest your money in a local farm.![Reblog this post [with Zemanta]](http://img.zemanta.com/reblog_e.png?x-id=b3218a2b-cc36-4969-9995-ce4fc78a3caa)
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1) I own a van. This in and of itself is not really a green sin if I was using it for what it was designed for. Carrying more than 4 people a good distance and reducing everyone’s carbon footprint. However, I usually am the only person in the van at any time and I only do short trips around the city. This could easily be accomplished with a smaller car or even by moped. In fact, the van was bought with the idea that a much larger family would be using it but life throws you a curve ball sometimes. I know I should get something smaller, I know it is too big for my needs, and I know the price to fill the take is pushing $70 now and will be well close to $100 by the end of the year. But people have odd attachments to vehicles. I love driving the van and the extra space has come in handy for multi-state moves and hauling big things. I should part with it but I can’t bring myself to do it.
3) Big Box Stores get my money more than local farmers. Vermont has a very high number of local farmers who produce milk, corn, beef, and other products that are better for me and i know it. But convenience has me going to the local supermarket and buying processed food from who knows where over local produce. Several people have started eating only local products and have termed themselves as “




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