Cut out centrial leader leaving 3 to 4 limbs equal spaced around tree on these 4 limbs cut all growth off topside limbs if want limbs longer than they are leave bud on outside limb to grow each limb longer and spreading peachtree outwards this need doing serval time during ayear or life tree. The best time prune peachtree is anytime on large cuts use prune seal on cuts this for seedlings. Older trees need pruning twice ayear unless over fertilized older tree as note start at 4 years old and bleed badly if cut after sap starts running up tree limbs January best time on large cuts over inch is large cut. Here another best time prune when growth only bud its waste of growth to let bud grow into limb before cutting off and nice tohave green thumb. summmer prunning on whips that bear peaches they never bear but once on the second year growth so after fruiting cut whips off tree if leave on tree they become unwant growth. Spraying in fall after leaf fall and before bud brake for leaf curl Thiram best percentage of control and yes seed treatment copper spray is next with lower precentage contol go to lowes and look in garden book there under fruit trees peaches leaf curl if have this desease. A Fruittree spray with 3 to 4 ingredents will give some contol. Common desease of peachtrees is leaf curl peach brown rot insects moths trunk borers.