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You can start with Greenhouse Specialists, on 130 by the new Credit Union. They mostly do larger stuff, but can order any size. Mostly, the tubing and such come from Oregon (Conley). They also sell shade cloth, and the 5-year plastic for the roof. Lots of styles to choose from. Foundation not needed... holes with concrete work OK, though digging them is a pit. Mostlyly you want it level and anchored so it doesn't blow away. Most folks also build end-walls. Sometimes on the gable type ones, the sidewalls are covered with shade cloth instead of plastic.
http://www.ghsinc.net/
Other than that, there's always the build-it-yourself approach, but the GH folks would be good for the plastic and other pieces. Wood would be likely to rot, so must be treated. That's one very good thing about the tube kind.
Jane
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Posts: 1,727
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Joined: Feb 2006
Ooops, you are right, elevation and location are important information. My garden is at about 500' elevation ocean over near Laupahoehoe along the Hamakua coast. A lot of the rain just misses us by going mauka so we probably only have about 100" of rain a year.
http://www.ctahr.hawaii.edu/seed/
That's the URL for the University of Hawaii seed order page. They sell home gardener packets of seeds at real reasonable prices and the seeds are for our climate. Well, some of our climates, we have so many to choose from!
If you have gardening neighbors who have open pollinated or heirloom seeds, see if you can borrow a seed or plant from them to get started with. All the plants in my garden are open pollinated (non-hybrid) so the best plants get marked for seed saving. Eventually the seeds will be selected for my precise gardening conditions. Yay!
While going to Kona yesterday with our local garden club to get some new taro varieties from the Amy Greenwell Ethnobotanical Garden (turn mauka at mile marker 110 and the taro are $2 & $3 each with better prices in quantity) we noticed someone along the upper road to Kona had built a nice small greenhouse shed. It was made of wood framing with that clear "tin" roofing type stuff for walls and roof. Wouldn't be hard to build although you wouldn't want to get too fancy or it would become a "building" and would then perhaps need a building permit.
"I like yard sales," he said. "All true survivalists like yard sales."
Kurt Wilson