Semi-Dwarf rootstocks produce a tree 50 to 60% the size of a standard tree with an average mature height of 12 to 15 feet. They normally bear 3 to 5 years after planting with an average yearly yield of 8 to 12 bushels. Fruit is fully as large and equal in quality to any standard variety. The semi-dwarf trees are our most popular as they provide superior anchorage, hardiness, disease resistance and wide adaptability.All apples require cross pollination by another apple variety. Ornamental flowering crab trees are also good pollinators for apples.