Blueberry Problem

The issue appears to be two fold: a nutrient deficiency and a secondary fungal leaf spot on a less than healthy plant. Blueberries also require very acidic soil, 4.5-5.5 pH. We would suggest a pH test for this area. With a low pH, the plant is able to take up the iron that it needs. Iron is not available if the pH is too high.You can fertilize with cottonseed meal to gradually bring down the pH number, but it is a slow process. Just remember that you want to be using an acid soil mix and an acid fertilizer.
You might also want to review your water practices as blueberries like ample amounts of water. Blueberries are very shallow rooted and do not tolerate any competition from other plants. They need to be mulched. Blueberries like full sun. Blueberries fruit according to the number of “chill hours” that they receive in the winter months. You need to know the variety of blueberry that you have planted.The following is a good article to introduce you to the concept of chill hours http://www.groworganic.com/organic-gardening/articles/find-your-thrill-with-blueberry-chill-hours