Hi. I see charts that show the recommended minimum spacing between fruit trees... I'm wondering if this spacing applies mostly to like trees. For example, if a semi dwarf apple needs 15' spacing, does that mean there must be no plants within 15' or just another similar tree? The reason I ask is that I have a semi-dwarf Fuji apple and a Gold Kist apricot about 15' apart and I'd love to use the space in between them to put a Satsuma.

Any thoughts or experiences on whether this is pushing it?