Why aren’t my blueberry and raspberry bushes producing more fruit?

Question: I have three blueberry bushes that I planted three years ago. They only produced berries the first year and nothing since. I add pine needles around them every fall. I have one of each: Bluejay, Jersey and Late Blue. What do I need to feed them or do I need more than three plants? read more Why aren’t my blueberry and raspberry bushes producing more fruit?