Considered hardiest of all. Others are Halehaven, J.H. Hale and Ranger. Plums Plums are considered among the hardiest tree fruits for the Colorado High Plains and are relatively dependable as far as fruit set. Italian freestone variety Green Gage . An old, dependable variety having good flavor.
Fruits are of good flavor, bluish with a yellow flesh.
A late-summer maturing variety with large, red fruit. Apricots Much like peaches, apricots are not considered dependable for fruiting. They are even less dependable than peaches. This is not because of hardiness but because their early flowering habit makes them subject to frost. Try a thick mulch of wood chips after the ground has frozen in fall.