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Patagonian Earthbag Pit Greenhouse — 6 Comments

  1. I had considered they might espalier the tree also, but according to my research avocados grow too fast/vigorous to use that pruning technique. Works well on apples, pears and plums though. The tangerine they hope to grow might be suitable for the greenhouse as there are probably some dwarf varieties. Both species in the most common commercial varieties get way to large.. As a kid I grew up in one of the largest citrus/avocado growing areas in California. Used to help pick and smudge..

  2. Makes me wonder if avocado can be espaliered. Espalier is an old, old way of using thermal mass to push the hardiness zone for fruit trees/shrubs. Prune a marginally-hardy tree up against a sun-warmed, thick brick or stone wall. Or earthbag, of course! This would work nicely in a pit greenhouse, backing the espaliered trees up against a taller/deeper wall at the back of the greenhouse.

    http://en.wikipedia.org/wiki/Espalier

  3. I like this design, but just wonder how they are going to keep an avocado tree from growing thru the roof.. Even the dwarf varieties get 8-10ft tall. : )

  4. This greenhouse seems way more practical than the walipini design that I reported on a few days ago. I like it a lot. This concept could really catch on.

    Paul: What are the daytime and nighttime temperatures inside? Did you use heavy duty greenhouse film? Did you cover the earthbags?

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