Ok, dragging this one sort of back.
I've seen lots of olive trees in nurseries, obviously this year's fashionable plant.
I assume that the olives I but in the supermarket are no good for trying to grow (yes, especially the pitted ones!!), so where do you get fresh olives from?
Also, what's the difference between a green olive and a black one? Different varieties? Different ripeness? I've often wondered that.