Blueberry Problem? Deficiency?

I have various varieties of Blueberries. My Ph level in the area is neutral. I over-sized the planting holes and amended existing soil with compost, blood & bone meal, and sulfur, after planting applied a good layer of compost.  2nd yr., Ph 6 to 6.5, Before Spring, added a top layer of about the same mix little extra sulfur. I also took my garden fork around the drip-line of all of them(10) and penetrated the ground leaving the holes. Then sprinkled sulfur down inside and reintroduced the fork wiggling to spread it out somewhat, then back filled. The plants have all shown noticeable improvement. I understand the Ph req's for the variety and that the sulfur takes considerable time to work.
This looks like the start of a Nitrogen Defc. to me. It's mainly only on the new growth of 3 of the 10 plants.
1. If I wait for the sulfur to "do it's thing" will it improve the nitrogen up take.
2. Should I go ahead and add additional N even though.
3. Do you know of a good solution for controlling Rust.

Your take please and Thanks

It's chlorosis, and in blueberries it's due to the soil not being acidic enough. I do not recommend adding nitrogen, at least at this time. Sulfur takes time, sometimes multiple seasons to lower a soil pH depending on how far the soil pH needs to go to get into the blueberry happiness zone.

My suggestion is to focus on lowering the soil pH and one way to do that is to acidify water to water the plants with. Some pH test strips will help guide you to get the water to a pH of 4.0-5.0, preferable closer to the 4 side of things. In my own experience, I have found a that a good drenching of with water with a pH approaching 4.0 will have the plants respond within a week.

Thank you, Off I go with my meter and vinegar for a temp. fix. I will apply and monitor as needed based on testing.
Any advice on Rust?

Will Wit wrote:
Any advice on Rust?

What I have observed is that disease affects plants that are sick / not in a healthy balanced state and healthy plants can handle disease on their own. My suggestion is heal the soil, not just with these blueberries but with anything. If the soil is healthy, vibrant, full of microbial and other life along with all the minerals, then what grows in that soil will be healthy too.

Blueberries cannot access many nutrients if the soil is not acidic enough, but it only needs to be highly acidic in a fraction of the root zone (ideally the soil surface (according to Michael Phillips in The Holistic Orchard). This can be achieved with acidic mulches and diverse microbes that will be selected amongst for acidification qualities by the blueberry in its trading of sugars for nutrients with the microbes it likes. I use pine/conifer needles and chips, though these are not all that acidic on their own, the plants are on a conifer based hugel surrounded by pines for dappled midday shade, much like their wild huckleberry cousins would like it.

Thank you both,

@Mr.Freyr
I agree,  healthy soil healthy plant w/ any disease - Rust. I see the evidence in my own plants from last year to this year as the soil transforms into something other than compacted disturbed ground absent of any organic/microbial life.

@Mr.Zumeta
Very good answer, "quote" perhaps? If not, you should try your hand at Authoring some literature.

Blueberries are a fungal dominant plant, and the ph is less important than maintaining that fungal type soil.  Mulching with pine bark nuggets and a double handful of goat manure compost should do the trick.  Gypsum and a little soft rock phosphate will supply the calcium/sulphur and phosphorous they need to produce healthy crops.  But not too much.  Would be best to hydrate those minerals and water around the base, away from the stem and put to about a foot on each side in a circular pattern.  Make the roots reach for it.  They are shallow rooted so  always keep a heavy mulch on them, but not touching the stem.  There is a type of mycorrhiza that only grows on blueberry roots, mountain laurel and rhododendron.  Dig up some of those healthy roots of those plants, scrape off the soil material and work that in around your blueberries.  Make sure you have enough humate in your soil so that it holds water, blueberries need a lot of water.  If they dry out, they die.  

Thank you very much, all of this is going in my notes. I really appreciate the knowledge you all are sharing with me.

If you need help in knowing how to improve your soil, take a long survey through Dr. Redhawk's soil series at this link.

Also, somewhere in that series he wrote that vinegar will raise the ph level of your soil. My blueberries are on a slope, so I pour out my leftover pickle juice 6 or so feet above my bushes. (We don't eat a lot of them.) Also, my leftover kimchi and sourkrout juices. I count on the rain to thin it out and carry it to the roots. My bushes are happier since I started doing this. Don't pour vinegar too close to the plants though. It can be used to kill weeds, so be careful.