Why would anyone need a greenhouse in Portugal? Given adequate water and soil fertility, the climate provides more or less ideal growing conditions pretty much year round. General climatic conditions though are one thing. Specific microclimates are another. This quinta has mountain ridges to the south and west and doesn’t get much heat from the sun early in the year. As a result, the clay soils are slow to warm in Spring. Any summer vegetable planted out much before May tends to stand still and then take a while to get going again once soil temperatures rise, so peppers and aubergines frequently don’t get harvested until October and November. A greenhouse in the sunniest spot on the quinta would make a huge difference. I could grow plants from seed in early Spring, bring them on while the soils warm up, and overwinter those which can be effectively perennialised for an early start the following Spring.
I also wanted to experiment with aquaponics to find a way of growing vegetables intensively without the need for supplemental irrigation.
The completion of the geodesic dome greenhouse was consequently eagerly anticipated. The covers went on at the end of April. Seeds were sown and plantings made. And since then, I’ve been revising my ideas of how growing our food here can be achieved almost as fast as the plants themselves have been growing.