Wow, interesting document, didn't realise you could get away with cramming
trees so close together.
I too am pretty limited for space and am trying to grow a wide variety of
fruit. I though I was crowding my apples in at 9ft apart but what is
suggested in this document goes much further.
I wonder has anyone got much experience with this technique and what kind of
success people have had. I imagine it's great for cross polination (as you
can easily plant several varieties) and thus have greater fruit set, but are
there any negative affects, for example stress on trees from close planting,
faster disease and pest propagation, etc.
If anyone has any comments I'd be very interested.