Thanks Fruitnut
I don’t know if this will be of any help. If nothing else, it can add to you list of things to worry about with blueberries. 
In any case, here’s a link to one possible problem.
So, probably screwed blueberry wise then? Think I should take them out of the ground and also trim them a lot?
I would not give up yet. Not sure what the right answer is? Maybe a few in pots to see if the ground is the problem. Add sulfur around the in ground plants. Add some vinegar to water, and make sure soil is acidic for now till sulfur kicks in. I would try and save them. Yes cut off dieback in case it is a fungus, dispose of cuttings. I myself use sulfuric acid to acidify, I use battery acid in water. It’s cheap at any auto store. Use litmus paper to give you a range. Blueberries can handle the acid in water. Be careful with it. Wear protection. Your eyes are important to protect. if you splash it on skin a quick wash will stop any burns. it’s only 30% acid not pure. You often here lead is in it, not true, it is pure. lead is in battery acid in your battery! Don’t use that!
Here are some new photo’s today. After pulling out the zoom. The old Blueberry bushes have the problem to it seems.
2. mushy color flowered, random or concern? 3. growing, but also browning.
4. Various purple branches on this one .5, healthy but a few spots
older one, Wavy leaves.
Will see if I can get anymore input, with more and some closer up photo’s.
Hey JGlass,
I’ve had the same exact problem as you with my blueberries this year and last year. Mine look exactly like yours where some of the cane tips turn to these black mushy canes. I typically just cut the black part of the canes off.
I’m not exactly sure what causes it, but I think it is a combination of freeze damage, lots of rain, lack of sunlight, and just a cold spring in general. The good news is that it generally clears up in a few weeks once the temperatures get near the 80s.
Last year, I thought it was because I applied fertilizer too early, but it appears that is not the case as it is happening again. I wouldn’t give up just yet. 
It looks like some kind of disease problem. But I can’t tell since I’ve never had anything like this. I think you can treat is just like powdery mildew and spray with organic materials. The organic (horticulture oil, baking soda, soap, etc.) won’t hurt the plants anyway.
I figured I would tag my issue onto this thread instead of starting a new one. Leaves on one of my blueberry have a lot of dead spots. This plant was doing great earlier this year and is in a fabric pot next to 8 other blueberries that seem to have no problem right now. Anyone have suggestions about what to do with this? Maybe I need to flush it a bit? I did add some osmocote to the soil when I planted it this spring, could this be toxicity of some sort? I did the same for all the other plants and they arent having issues right now. One had small leaves and wasnt growing much, but I flushed it and it seems to have perked up a bit, it has a few inches of new growth going now.
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It has the look of getting too dry. Salt burn is usually at the leaf edges. Leaf burn from being too dry occurs on the most exposed portions of the upper leaves.
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Thanks man, its been VERY hot here for the last week or so, 103F yesterday. Ill give her a good soak tonight. This plant is on the SE corner of the group, so it gets the most direct sunlight on the pot also out of the whole group…
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I have a few Blueberry plants in containers that look like that.It could be,that the transpiration in the leaves is too great for the roots to compensate.
Hopefully it’s not bacterial leaf scorch. Brady
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