My peach tree is about 11 years old. Puts out plenty of blooms and fruit. Fruit is good till about 2 weeks before totally being good and ripe, then they just dry up and look like old prunes!! I've had one year that I got to pick peaches. Gets plenty of sun and water, have trimmed back and even made sure there is a V in it for more sun. Sap comes out of all the branches, not tree itself, but branches in dime to half dollar size and this is on all branches. Leaves are healthy, blooms are healthy, don't understand about sap or why peaches dry up.