I dry and powder leaves for the year from the old (existed mature prior to 1952) olive orchard that is just a block north of me. They exist among houses now, however the people around here let them fruit.
I have been saving the seeds from these as I harvest the olives and dry them... just what I need daily though until the season ends.
A few home owners have cut the olive trees down in their yards and have planted various green grasses and ornamentals among other things... :-\
One home owner is doing what myself and neighbors are doing and planting three to four fruit trees a year... the entire back yard and about a third of the front yard is garden.
My goal is to span the year with fruit... next trees will most likely be pomegranate and plum.