Yes they grow well in my country but not well enough in my area. So i don't really know the answer to this question, but i am sure you need to have quite a few trees to make it matter. I have a few olive trees but not for oil, just to eat the olives and these trees are a different variety than these for oil production. The reason is that my area is colder than the average greek territory. Also we don't have oranges and lemons here for the same reason, in contrast with other areas. So... my opinion is try to plant whatever is suitable in your area and doesn't need much effort to grow. If you do want something badly enough and you are in the mood to make the effort and you don't need many trees to have a satisfying result, then you can try something. But you already have lemons (i suspect it was lime) in your greenhouse... See what i mean? I think you should focus on what is suitable for your area, but that's my opinion.