Hello, fellow Missourian here. Up north of St. Joseph. I planted two apples, one peach, one apricot, and two cherry trees in 2019. What I learned from being new to fruit trees was that they take a lot of research!
Apples: You need two different varieties to pollinate eachother. On top of that, they are divided into 3 bloom periods (the approximate window of time when they flower)so those trees need to be in the same bloom period too! This is usually indicated in their description as "early, mid, or late blooming." You can get away with an early and mid partnership, or mid and late, but not an early and late because the early flowers would be gone by the time the late tree blooms and the pollen would never meet.
Also with apples, note what resistance they have. There is a lot of cedar
apple rust disease in NW Missouri so resistance to that is important. I went with Redfree and Enterprise apples to meet these criteria.
Peaches, apricots, and cherries may vary in whether or not they self pollinate, so that determines if you need more than one. But they will always do better with a partner to pollinate with.
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