dyzzypyxxy said:
Last thing I can think of for right now is that you do NOT want to plant the red rasps too close to the black rasps or they will cross and you might get berries you wouldn't like too well after a year or two.
The recommendation to not plant black raspberries near red raspberries is because black raspberries are highly susceptible to viral diseases that red raspberries are largely unaffected by, but often carry. Sexual reproduction by commercial berry cultivars is pretty rare in garden situations. Not that it matters in this case, because 'Ebony King' is a blackberry cultivar.
One thing that hasn't been mentioned yet is that raspberries and blackberries have very different fruiting habits. Many raspberries, including 'Heritage', produce fruit on both the first-year canes (primocanes) and the second year canes (floricanes). Most blackberries, including 'Ebony King', only produce fruit on the floricanes. Consequently, they need to be pruned very differently. 'Heritage' raspberries, in particular, are famous for the fact that you can simply mow down the whole patch each spring and still get a heavy crop of raspberries in the late summer/fall. With blackberries, on the other hand, you have to be careful to prune out the previous year's floricanes each spring while retaining the previous year's primocanes (which will become the floricanes in the current year).
