Before it started "dying" i didn't use any pesticide, but once I saw it and saw the spiders we sprayed with Ortho Home Defense 3 in 1 insect killer. We only sprayed once. I don't think the blueberry is dead though...

As for the Iron deficiency , I bought Miracle Grow for acid loving plants. Will try that tomorrow and see if it heals!

I checked the pH in the soil and it was actually 7. So hopefully it is just iron deficiency.

The roots are in good shape :)

Don't know what's causing those brown leaves. But btw Your ph is too high. It needs to be 4.5-5.5. Use rainwater if possible. Nurseries have additives to lower ph. Blueberries can die at ph7. When I see those bright green leaves like in your first pic I know my bush is in trouble.

If the plant really did go from healthy to sick-looking in 4 days it wouldn't be a deficiency or pH problem. That would cause slower deterioration. To me it looks more like something chemical or physical. A tall dog? A spraying animal? A jet of hot exhaust or steam?

I don't have any dogs or cats... it does look like a chemical burn.

Some of the leaves have fallen, but some are starting to turn green again. I think it will make a comeback!

Hi,

Did you find a solution for this? I have the same issue but cant recall spraying anything on it. Newly potted, but ph is close to 7, used loads of coffee ground.

Coffee grounds are slightly acidic and are a good addiditive but will not get the pH into the 4.5-5.5 range they NEED to survive. Add some vinegar to your water or use a soil acidifier. As for the dead/brown crunchy leaves; if that's the case, it's something else. Blight maybe?