first lets discuss the blueberries and blackberries..
blueberries require a very very very acid soil..so you must prepare your bed well before putting them in and then continue to work on it if it tests too sweet....i use oak leaves, sawdust, bark, manure, pine needles..etc.. in my blackberry beds..to make sure it is acid
enough for the blueberries..black berries are not that fussy but they will spread..so make sure you have a place that is isolated as you could get a large patch with just a few canes.
best to plan to tie them up to a system with a post on each end and wires between..you cut the dead canes out each year.
as for dwarf fruit trees, best to plant the varieties that you would buy to eat when you go to the store..if you like a Braeburn, plant a Braeburn..etc...there are the minis, the poles, the dwarfs, the semi dwarfs and the standards..standards are generally a lot of work to care for as they grow darn big.
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this is a photo of a standard
apple tree that grew from a discarded
apple here..they are plenty large..make a great shade tree or climber though.
Apple and other fruit trees do best with flowers or plants under them rather than grass ..as grass robs the trees of nutrients and just aren't good for the health of the tree..flowers and herbs and even vegetables..will bring in pollinators..(as if that tree needs to draw polinators !!)
that big tree has hundreds of violets and hostas under it.
Semi dwarf trees are a bit smaller than the standard..and a bit easier to manage..dwarfs are smaller yet..by about half or more the size of a standard..
pole trees grow tall and skinney..which is nice for a narrow area or in a vegetable garden as they don't cast much shade..
the minis..are very small ..usually grown in a tub on a patio..but can be planted in the ground..i wouldn't bother with them unless i had a very very very small property.
i prefer the dwarfs myself..easy to spray and prune and harvest..nice size in a mixed
garden bed..shade isn't very deep so you can grow things under and around them..they are beautiful..very easy to care for.
also when you look at the descriptions in most catalogs or on the tags or whatever..they will tell you what zones they grow well in.
genearlly all fruit trees are better with 2 of the same type..like two apples, two pears, two cherries..etc..but it is best to do a little research as some might require a pollinator that blooms at the same time as the one you have chosen..of a different variety.
pear for example..my ayers pears require a bartlett or other pollinator..my pollinator died so i had to buy another one..for my two ayers pears so they will bear.
sometimes you can buy trees that have more than one type grafted on the tree..that saves having to buy a polinator..say a 5 in one pear or a 5 in one apple..
hope this was helpful.