Nut trees such as the American black walnut tree, Juglans nigra, and the hickory, Shagbark tree, Carya ovata are productive in Iowa backyard gardens. The Chinese chestnut tree, Castanea mollissima, will grow and produce high quality chestnuts with a rich flavor and a crunchy kernel. Almond trees are not recommended for Iowa gardens, not even the Hall's Hardy almond tree. The almond tree will live but will not produce almonds, because late numerous spring freezing ruins the flowering period.
The State of Iowa is located in the USDA, 4-5 zone map with a similar climate to the the State of Nebraska. Flowering trees are important for planting in Iowa, especially the Kwanzan, Japanese pink, flowering cherry trees that are loaded with flowers in early spring. In Des Moines, IA. the white flowering dogwood tree grows well as a companion flowering tree to the American redbud tree that blooms at the same time.
Fruit trees are important backyard trees for planting in Aimes, Iowa, and the Red Delicious apple tree and Golden Delicious apples bear abundant crops of fruit. The Granny Smith apple tree or the Dolgo crabapple fruiting tree are commonly used for cross pollination, that is required for the production of apples. Apricot trees are not a good fruit tree choice for IA gardens, nor are peach trees, because extreme cold temperatures most often in late spring will freeze the apricot or peach flowers, so that neither peaches nor apricots can grow.
The cold hardy, improved Kieffer pear tree grows well in IA landscape gardens, and the Kieffer pear is tasty, crunchy and ripens in late fall. The Blue Stanley plum tree fruit will survive the extreme frigid winters in IA, when snow and ice cover the ground during most of the winter and spring. The red mulberry tree, (Morus rubra) is a wild introduced mulberry from Europe. Many new delicious, mulberry, grafted cultivars are available to buy online. The pie cherry, sour cherry tree, will grow well in Iowa and the red North Star cherry tree and the red Montmorency cherry trees produce bushels of juicy, delicious cherries. The Medlar fruit tree and the Russian introduction, 'Nikita's gift'. persimmon trees are delicious to eat and the Medlar and the persimmon that came from the Black Sea area of Russia are both cold hardy.
The cold temperatures of Iowa winter are too frigid for growing black raspberries and, also, too cold for the sweet cherries. Black Tartarian and Bing cherry tree. The temperatures are also too cold to grow blackberry plants in Iowa, whether thorny blackberries or thornless blackberry bushes. Blueberry plants do not like the alkaline soil profiles that are found in Iowa, and if blueberry bushes are planted they should be containerized and the acidity of the soil can be adjusted to pH of 4.5 to 5.5 by planting the blueberry plants with Canadian peat moss. Red raspberry plants grow and produce abundant crops. The Fall Gold raspberries and the Heritage red raspberry bush and the Boyne, red raspberry bush are recommended for Iowa berry farms.