Blue Prunes Blue prunes are showing up now that hot weather has finally arrived. These blue prunes will fall off and are a concern to many growers. In fact the blue prune problem can be tied directly to hot weather.
Blue prunes are more common in cultivated orchards than in sod orchards due to reflective heat.
Tissue Analysis Leaf analysis is best taken in July when nutrient levels in leaf tissue are stabilized. Good critical values to help guide you in your fertilization practice have been established for the major elements. Analysis can reveal specific nutrient deficiencies or can alert you to potential problems that might be coming up. It's usually best to run two samples. Usually about 30 leaves per sample from that area and compare with results of a sample from your best area.