A complete list of apple varieties that can be grown in Eastern Idaho is on the Apple Varieties page. The apricot is one of the earliest fruits to bloom in the spring, and its blossoms often are killed by frost. It should be grown commercially only in frost-free sites warmer than zone 5. Apricots should only be planted in warmer, protected sites to avoid problems with killing frosts. The flower buds freeze over winter and if blooms do not occur, early frosts generally kill them.
Sour cherries are vary hardy and do well in Eastern Idaho in most locations.
For sour cherries, Montmorency is the best. Others are Northstar and Early Richmond. In our area this occurs too frequently to depend on production even in the home orchard. Reliance, an exceptionally hardy cultivar, can withstand temperatures of -25 o F and has been tried in Eastern Idaho with varied and limited success. Try this variety only in very protected areas.