|I have three, two-year old Nanking Bush Cherry plants. Do I still need a pollinator? They have not flowered.|
|You need two Nanking cherries for pollination, so you've got the bases covered there. If your plants have not flowered, it's probably because they're just too young. Give them another year or two to mature and they should produce an abundance of fruit.
As with all fruiting trees and shrubs, full sunshine is a must.
Enjoy the fruits of your labor!