Utah State University Extension
Peaches are the second most important fruit crop in Utah by acreage. Peach fruit that ripen under our high desert conditions (warm sunny days and cool nights) are valued in the market for their flavor and sugar content. However, peaches are more sensitive than most other fruit crops to our alkaline soil conditions, and often suffer from iron chlorosis.
Commercial peach trees consist of two cultivars or varieties that are grafted together: the scion produces the above ground portion of the tree, and the rootstock forms the roots and the base of the trunk (below ground). The scion variety determines the characteristics of the fruit (size, color, quality) and the flowering and fruit ripening time. The rootstock variety influences tree size and growth habit, productivity, insect and disease resistance, soil adaptability, and may also influence cold hardiness.
Black, Brent; Maughan, Tiffany; Beddes, Taun; and Reighard, Gregory, "Selecting Rootstocks for Utah Peach Orchards" (2020). All Current Publications. Paper 2130.