True dwarf fruit trees are small trees that produce fruit of the size that one would expect to find on a normal tree. They are produced by grafting a "scion" (twig) from a regular-sized tree onto a dwarfing rootstock. The rootstock keeps the tree from growing large, but allows it to grow normal-sized fruit. Almost any kind of fruit tree can be dwarfed.
Grapefruits are excellent for dwarfing and many varieties are available. Included among these are the seedless oroblanco grapefruit, which produces excellent fruits without needing intense summer heat. If you live in a warmer area, star ruby and Rio red are tasty red-fleshed varieties. There are also many varieties of oranges, lemons and limes available to be dwarfed, including blood oranges (excellent for juicing), Mandarin oranges, Mediterranean and regular lemons, seedless limes and limettas.
The apple is a very popular fruit, and like citrus trees does well as a dwarf. One variety is the Pinkabelle apple, which grows to only 6 1/2 feet in height. The fruit is similar to Pink Lady apples. Granny Smith, Yellow Delicious and red Fuji apples are also available in their dwarfed versions. It is generally desirable to plant these trees in pairs so that they can pollinate each other, which causes the trees to produce more fruit. It is not necessary to have two trees of the same variety of apple to accomplish this.
Peaches and nectarines are both available as dwarfs. White-fleshed Sunset Dwarf Red Leaf peaches grow well in warm climates. Dwarf Valley Red produces yellow-orange fruits with a very sweet flavor. The dwarf standard variety produces white-fleshed peaches that mature in the summer.
Cherries and Plums
The North Star cherry is often dwarfed and produces many delicious cherries for its size. It grows to 10 feet at maximum. Bing and black Tartarion cherries are also available dwarfed. The famous Santa Rosa plums are often sold dwarfed as well.
Black and red Shahtoot mulberries can be cultivated as dwarves, and they produce large, juicy mulberries. The trees can be kept under 13 feet, but require extra pruning. The berries can be eaten right off the tree, and can also be used in a large number of recipes. If the tree is pruned immediately after harvest, there may be a second crop.