Posted: 30/08/2017 at 21:15
I would use the Miracle Gro that you use on the Camellias. No need to feed the blueberries now. I fed my roses earlier this month as they will still produce flowers, but that is probably the last time I'll feed them this year.
My blueberries are in plant saucers, I water on top until the saucers are full, then 2 days later. It can get pretty hot here in summer. So I'm not an expert on watering in England. I imagine you would water less often in the wetter west.