Blueberry problems

[Emmafh]

So I bought this blueberry about 6 years ago, its been in a container during many moves and its produced a fair few blueberries for us. I never really gave it much attention so not 100% on its flower cycle.
Winter before last I finally planted it into the ground and last year it had tripled in size but never produce fruit (check soil ph ect ect). This year I've noticed some catkin looking things? Is this the beginnings of it starting its fruiting cycle?

 

[Emmafh]

With pictures

 

[DirtMechanic]

Which blueberry is that? This is the fruiting body on ours. They do not look similiarto me.

 

[Emmafh]

That's what i remember when we had fruit haha , so basically did a lot of digging and it's a type of willow that's somehow invaded my blueberry pot and then got planted with it. I tore it out tonight and found the tiniest blueberry plant fighting for some space amongst it all. Now to wait a few years for it to be big enough to produce again!

 

[DirtMechanic]

Ammonium Sulphate is your friend.