Apple Rootstock Info: M.26

Characteristic Detail Description
Rootstock M.26

Resulted from a cross between M.16 and M.9 in 1929, at the East Malling Research Station, Maidstone, Kent, England. Traditionally considered a dwarf rootstock, but is one of the more vigorous dwarfing rootstocks. M.26 is grown widely throughout the world and is included as a “standard” in many rootstock trials. M.26 is precocious and very productive, produces many burrknots, and is susceptible to crown rot and fire blight. In a joint effort to produce virus

Apple Rootstock Info: M.9

Characteristic Detail Description
Rootstock M.9

The pedigree is unknown and it was selected in England from a group of French genotypes known collectively as “Juane de Metz” in the late 1800s. M.9 is the most widely planted dwarf apple rootstock in the world and at least 30% of the trees in the U.S. are on M.9. M.9 EMLA is free of known viruses and is slightly more vigorous than the original M.9. Over the years European nurseries have selected clones

Apple Rootstock Info: MM.106 EMLA

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

Apple Rootstock Info: M.27 EMLA

Characteristic Detail Description
Rootstock M.27 EMLA

Selected in 1934 from a cross of M.13 x M.9 at East Malling Research station in Maidstone, Kent, England and was tested as Malling 3431. M.27 EMLA is a very dwarfing rootstock and is probably too dwarfing for most commercial situations except for vigorous cultivars on vigorous sites, but it might be considered for home gardens where a small tree is desirable.. Trees on M.27 EMLA are very precocious and productive and require permanent

Apple Rootstock Info: M.7 EMLA

Characteristic Detail Description
Rootstock M.7 EMLA

Formerly known as EM VII. Selected in 1912 from unknown parentage at the East Malling Research station in Maidstone, Kent, England. Trees on M.7 EMLA produce a semi-dwarf tree about 60 to 70% as big as seedling. Trees are moderately precocious and may lean with some cultivars and may require trunk support. Trees tend to produce many rootsuckers. M.7 EMLA has been widely planted since the 1960s with cultivars such as ‘McIntosh’, ‘Empire’, ‘Cortland’,

Apple Rootstock Info: MM.111 EMLA

Characteristic Detail Description
Rootstock MM.111 EMLA

Introduced in 1952 from a cross of Merton 793 x ‘Northern Spy’ by the John Innes Horticultural Institute and the East Malling Research Station in England. MM.111 EMLA is one of the more vigorous semi-dwarf rootstocks, producing a tree about 85 to 100% the size of seedling. It is resistant to wooly apple aphid and is quite tolerant to fire blight and crown and root rots. It is fairly winter hardy and produces moderate

Apple Rootstock Info: M.4

Characteristic Detail            Description
Rootstock M.4

Selected in 1912 from unknown parents at the East Malling Research Station in Maidstone, Kent, England. M.4 is slightly dwarfing and produces a tree about 75-80% standard size. It is considered fairly precocious, and trees tend to lean and may require trunk support. M.4 is resistant to collar rot. In an Indian rootstock trial trees on M.4, MM.106, and MM.111 were all about the same size. Cumulative yield was greater than trees on MM.111, similar