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: GR O WING DWARF TREES

Gardening By John P. Begeman
Special to the Arizona Daily Star
Tucson, Arizona | Published: 07.27.2008
You don't need lots of backyard space to grow fruit trees.
Several dwarf fruit trees take as little room as a pot on the patio.
Dwarf fruit trees come in two distinct groups: genetically small or dwarf varieties and those whose size is controlled by a dwarfing rootstock.
Small fruit trees include pomegranate and Mexican lime. Dwarf fruit varieties include "Blackjack" dwarf fig and "Bonanza" dwarf peach.
In addition to small and genetically dwarf fruit trees, there are those whose dwarf properties are imparted by their rootstocks. Dwarfing rootstocks for apples include Malling 9 (M.9) and Malling 27 (M.27). Apple trees with Malling rootstocks are available from mail-order fruit-tree nurseries.
You can also find many trees sold on a dwarfing citrus rootstock called "flying dragon," which further limits size.
An adequate-size container is a must. Half wine barrels are the perfect size. Large, "feather-lite" foam pots are also good. Avoid large plastic pots because fruit trees need some full sun exposure; plastic degrades in direct sunlight.
A 24-inch-diameter container, with adequate draining holes, is the smallest size recommended for growing dwarf trees.
As for a soil mix, use any common bagged potting soil with the liberal addition of perlite. Mix four parts potting soil with one part perlite. Do not use straight potting soil, as most are too heavy and do not allow for good drainage.
Although fruit trees grow best in full sun, here in Arizona our sunlight is so intense that some midday and afternoon shade is welcome May through September. It does not have to be a heavy shade; filtered light provided by a mesquite or palo verde tree will be adequate.
Benjie Sanders / Arizona Daily Star
● John P. Begeman is the urban horticulture agent for the University of Arizona-Pima County Cooperative Extension. Call 626-5161 to reach a master gardener.