EMLA. 7 (Malling-Merton 7): The most widely planted rootstock. Grows poorly on light or sandy soils but performs well on deep fertile loam soils. Anchors well and produces a strong, sturdy tree. Moderately resistant to collar rot. Tree will be 15-16 feet tall at maturity. Plant trees 12-15 feet apart in rows spaced 16 – 20 feet apart. The virus-indexed EMLA clone was introduced in 1974-75.
EMLA.106 (Malling-Merton 106): Excellent anchoring qualities with well-developed root system. Produces an early fruiting tree with heavy cropping potential, moderate vigor and with resistance to woolly apple aphids. Susceptible to collar rot, so cannot tolerate wet or poorly drained soils. Best rootstock for harsher mountain growing conditions and recommended for use over a wide range of soil and climatic conditions. Plant trees 12-15 feet apart in rows spaced 16 – 20 feet apart. The virus-indexed EMLA clone was introduced in 1969-70.
Antonovka: This tried-and-true Russian rootstock will produce a large tree which will grow to be 25 to 35 feet tall at maturity. A strong, vigorous rootstock with great adaptability to a wide range of soil types. Very cold-hardy stock, surviving temperatures down to -50 degrees F. Excellent disease resistance. Smaller tree heights can be maintained with proper annual pruning.