Depends your reasoning for growing them. If you want to harvest fruit, keep them together so you can net them, else the birds will eat most of what you plant. If its for wildlife it doesnt matter as much, but larger bushes could choke out smaller ones of different variety over time. Id skip nanking and plant either carmine jewel or juliet cherry or maybe both. Red currant rovada is kinda the standard now, but you could try rosetta or rolan or rotet also, I dont have any yet so cant speak for them as much. Honeyberry depends what you are looking for, do you want something for fresh eating or processing? The new U of S varieties, aurora, beast, beauty and blizzard are probably the most tested and best developed but there are also some varieties from berries unlimited that look interesting. Might be worth checking out. A lot of those come from Russia i think. Spaciing depends on what you want, do you want individual bushes when they mature or a hedge?
