The end of my garden is a south facing 6ft fence, I would like to grow fruit trees along here. My father grew what I think he called Ballarina trees - long slim trees about 3ft apart. This would mean I could grow about 5 trees in the space I have got - question - does anyone have any experience on these and advise on buying, what I think is a maiden tree ???, then pruning to make the column effect ???. any help / advice would be very grateful.