Disease spreading from shrub to shrub, leaves look sickly, yellow and/or dry out, then drop off resulting in a bare shrub. Tree Hydrangea, shrub Hydrangea, Burning Bush and Dwarf Cranberry are in one garden, south facing along house, began in more shaded area We have watered, used Bayer Vegetable and Garden Insect Spray and Bonide Copper Fungicide. Now seeing webbing on dried leaves and branches. Continuing to spread. Large Hydrangea Shrub yellowing from the center of plant. Can;t seem to stop it. In another garden, west facing, hosta leaves are turning yellow then brown. A newly planted this year, Azalea's leaves turned rust colored. There is some new green growth but some of that is turning color. We are in clay soil. Have never experienced this before and don't know what to do. I can send more photos. Thank you.