Hello tk,
What kind of fertilizer is being used?Maybe try a little Ammonium Sulfate. Brady

Healthy looking plant, congratulations, blueberries can be a challenge to grow so the fact that you have kept it alive for three years says you are doing a lot of things correctly.

As Brady suggested, give it some ammonium sulf (21-0-0)..........you can either dissolve a tablespoon of ammonium sulf in a couple gallons of water and pour it around the base or sprinkle an ounce (couple tablespoons) around the dripline of the plant and water it in. In a few weeks if you don't see some new growth (light green leaves at tips of branches) then apply again. Once you start seeing the growth then back off the fert....you don't want to overdo it.

RM

How much sun does this plant receive and what variety is it? The plant looks healthy but should be much bigger after 3 years!

The bushes are in a full sun bed. I will get the fertilizer recommended. I was using the hollytone.