Apple Rootstock Info: MM.106 EMLA

Apples January 05, 2015 Print Friendly and PDF


Characteristic Detail Description
Rootstock MM.106 EMLA

Selected in 1932 from a cross of M.2 x ‘Northern Spy’ by the John Innes Horticultural Institute and the East Malling Research Station in England. MM.106 EMLA is a semi-dwarf rootstock, producing a tree about 60% the size of seedling. It is quite precocious and productive and usually does not need tree support. It is resistant to wooly apple aphid, but is highly susceptible to crown and root rots, susceptible to fire blight, and is hypersensitive to tomato ring spot virus. When used with ‘Delicious’ and some other cultivars tomato ringspot virus can cause a hypersensitive reaction called “brown line necrosis” and trees decline in vigor and die. MM.106 EMLA should not be planted on wet sites due to crown and root rot problems. Trees produce few burr knots and root suckers. This rootstock has been grown widely throughout North America since the 1960s and may be a good choice for home gardens with well-drained soils and space for semi-dwarf trees, but its use is declining for commercial orchardists who are interested in smaller trees with fewer disease problems.

Synonyms Malling Merton 106 EMLA, M.106
Origin Northern Spy X Malling 1
Availability Widely Available
Tree Size 70-75% of standard
Precocity Early
Winter Hardiness Very susceptible early. Hardy late winter
Suckering Very little
Tree Support Needed Yes
Where tested within NC-140 or other research plantings  


MM.106 tree MM.106 tree with fruit
MM.106 EMLA Tree MM.106 EMLA Tree with Fruit


MM.106 blossom MM.106 flower cluster
MM.106 EMLA Blossom MM.106 EMLA Flower Cluster


MM.106 fruit
MM.106 EMLA Apple Measure

All images used with permission. 

Connect with us

  • Facebook


This is where you can find research-based information from America's land-grant universities enabled by



Apple Rootstocks

  • All about understanding and choosing the right rootstock

Apple Cultivars

  • Characteristics, descriptions, and how to choose the best to grow and eat

Establishing an Apple Orchard

  • Buying and planting trees

Managing Apple Trees and Orchards

  • Insects, diseases, wildlife and other challenges

Propagating Apple Rootstocks and Trees

  • Grafting, budding, tissue culture, and all about how rootstocks are developed

Regional Resources

  • Links to apple information specific to your area


This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.