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The influence of 9 rootstocks on growth and production of ‘Goldspur’ (GS) and ‘Wellspur Delicious’ (WS) and 3 rootstocks on growth and production of ‘Red King Delicious’ (RK) and ‘Golden Delicious’ (GD) apple (Malus domestica Borkh.) trees was evaluated. The spur-type ‘Delicious’ strain (WS) produced more fruit per tree than the non-spur (RK) strain with Mailing (M) 7 and Malling-Merton (MM) 106 but not with M 26 roots. ‘Golden Delicious’ produced more fruit per tree than GS on all 3 stocks. Yield efficiencies were usually superior with spurred strains. There was a decline in efficiency evident or projected with RK. Comparing cumulative yields after 16 years with 9 stocks within spurred strains showed that highest yields were with MM 106 roots. Yields were influenced by tree spacing, scion type, and rootstock. Clonal rootstocks were more efficient producers than seedling. The least size-controlling stocks (seedling, MM 104, MM 109, and M 25) tended to be less efficient producers than M 2, M 7, M 26, MM 106, or MM 111 in the final year of the experiment, but the differences were not all significant and the trends throughout the experiment were not consistent, partially due to biennial bearing with some stocks. Largest trees with spurred tops were WS, GS/seedling, MM 104, and MM 109, and smallest trees were on M 26. RK/M 7, M 26 were identical in size.