Apples normally bloom in late April to mid-May. Tree Selection Planting distance between trees will depend on type selected. Standards are planted at least 35 feet apart, semidwarfs 20 and dwarfs 10 to 15 feet. Semidwarf and dwarf trees are easier for most gardeners to handle. Dwarf trees must be staked or trellised because of their small root systems.
Standard trees take longer than semidwarfs or dwarfs to bear fruit.
Buy only from reputable nurseries. There are over 6,000 named apple varieties, and many of them are not suited to Delaware's climate. Spartan, Jonathan, Red Delicious, Jonagold, Empire, Golden Delicious, Idared, Spigold, and Mutsu are popular varieties. Stayman, Winesap, or Black Twig are good keepers. All three are good for cooking.