I have 3 assumed 'own root' manchurian apricots and... just ran out of space.

Can they be 300' apart for pollination? That is, with a house between them as well. There are honey bees.

Also, being own root the assumption is there is no dwarfing. If I have a 12' wide strip against the house- is there space to plant two on that 12' strip? I can prune, just not wanting to have zero apricots if they need more room.

Thanks.