Medicine is not for everyone. Choosing to pursue a career in medicine for prestige or financial rewards will likely be disappointing, as most physicians find that medicine is a vocation that requires a commitment to service, lifelong learning and the dedication to practice competently and compassionately.
Though in many European orchards the number of trees per acre is set at 5,000 trees or more, in the US the apple tree density starts at 450-485 trees per acre with a maximum of 1,100 trees/acre. This is a recommended number for the dwarf apple trees.
Apples are one of the most cold-hardy fruit producing trees, as they bloom late in the spring, avoiding frost damage. Currently, 7,500 varieties of apple trees are grown worldwide. According to Fruit-Trees, most apple tree varieties are rated for hardiness zones five through eight. However, some varieties are hardy in zone four and zone three.