Malling 7 (M7) ZONE 5-8 One of the most desirable rootstocks when factors such as production efficiency, longevity, ease of propagation, hardiness, compatibility and disease resistence are considered. P.18 is a vigorous apple rootstock and will eventually produce a full-size tree. Similar in size to vigorous clones on M9 such as Nic 29, usually most efficient dwarf rootstock. Apple Rootstocks . Ground around the tree should be kept weed-free (e.g. Trees are moderately precocious and may lean with some cultivars and may require trunk support. Resistant to fireblight. This work is supported by New Technologies for Agriculture Extension grant no. It is extremely cold hardy, well anchored, and works with most soils. Our site experiences the coldest mid-winter temperatures across all locations. Image from Rootstocks for Apple, Washington State University. Small centre leader / spindlebush, Cordons, oblique cordons, Small espalier / fan, The most important dwarf apple rootstock, planted worldwide. Also, land grant universities do a lot of rootstock comparison. Plot) 0.0 1.0 2.0 3.0 4.0 5.0 0 10 20 30 40 50 60 P. 2 2 G. 6 5 B. Despite being susceptible to fireblight and woolly apple aphid, it is very resistant to collar rot, produces few suckers, maintains good fruit size, and is extremely productive and precocious. Seedling rootstocks (for example, Granny Smith open pollinated seedlings), although used for the rootstock, are variable in growth and are more susceptible to stress conditions, such as the effects of drought on fruit size. [60% size of standard tree] This rootstock is precocious, fire blight and woolly apple aphid resistant and cold hardy. It is very precocious compared to other semi-vigorous rootstocks, and tolerates heavy soils and difficult conditions. 2015-41595-24254 from the USDA National Institute of Food and Agriculture. Suitable forms: G.41 is a new rootstock in the M9-class, very resistant to fireblight and collar rot and tolerant of replant disease. One of the original Malling series rootstocks, widely planted in North America, and noticeably more vigorous than M26. It is also very cold-hardy. Produces a semi-standard tree, similar to MM111 but with much better cold hardiness. Featured. It has good fireblight resistance and cold-hardiness. M7 G6210 G6879 G8189 iAu514 iAu568 G6976 18 G5890 G6001 G6253 G4013 TEB M2 G4213 TEC G5463 G6589 G6024 X-2) 0.0 0.5 1.0 1.5 2.0 2.5) Performance of Fuji with 53 Rootstocks (Crist Bros. These rootstocks each have a characteristic effect on the scion variety growing on top. Small centre leader, Pyramid, Step-over, Patio container. Selected in 1912 from unknown parentage at the East Malling Research station in Maidstone, Kent, England. Trees on M26 Apple Rootstock – EMLA 26 grows 8-12 feet tall, is very winter hardy, adapted to most soils, and well anchored though may need staking on windy sites. Apple Rootstocks . Characteristics of Apple Rootstocks Rootstock Size1 Fruiting Anchorage Hardiness Soil Adaptability Crown Rot Fire Blight Remarks Seedling 100% Slow bearing, yield variable but generally low Well anchored Considered hardy, but variable Widely adapted Variable Tolerant 65-85% size control with spur-type Red Delicious strains; some size control with other spur-type strains. At present rootstock blight is poorly understood. For the backyard orchard, 7ft spacings would be more practical. The fruit size that M7 produces is good but not as large as an M26, or M9 rootstock. APPLE Rootstock. It is classified as having growth control similar to M.7 at about 45-55% of seedling. An old rootstock that dates back to 1688, M7 produces semidwarf trees. 3 to 5. hardy ; drought resistant; well anchored; M7 (semi-dwarf) 12 to 14. It is not resistant to replant syndrome. Geneva 969 (G.969) is a semidwarfing rootstock that is resistant to fire blight, crown rot, and woolly apple aphid with good cold hardiness. Trees with cultivars such as ‘Gala’, ‘Stayman’, and ‘Granny Smith’ tend to lean excessively and require support. MM111 can be slow to come into bearing, and is not suitable for the coldest zones. These are relative terms. Resistant to fireblight, powdery mildew, and root collar rot. Slightly larger than M26, but far more productive and precocious. However not ideal for North American growers because it is not particularly winter-hardy and has poor resistance to fireblight. An adaptable, precocious, and productive new rootstock. 9 E u r o p e B. Some authorities suggest that M27 is ""difficult"" because it is so small, but in our experience growing M27 apple trees is straightforward provided you attend to their needs - regular watering, good soils, mulching and weed suppression. There is likely not a “best” apple rootstock, though the replant-tolerant Geneva rootstocks (G.41, G.214, G.935, G.210, G.30, G.890) are much better than the available standards of Budagovksy 9, Mark, Malling 9 clones, M.26 and the semidwarf rootstocks. Suitable forms: Very winter hardy, widely adapted. M.7 … It is a winter hardy rootstock with low suckering. Good anchorage. Tree size at any age will vary with the cultivar, the soil, nutrition, pruning practices, amount of cropping, and climate. It belongs to Malling series which was developed at the East Malling Station England. Specialist fruit trees for your orchard or back-yard. Trees tend to produce many rootsuckers. Trees on M.7 EMLA produce a semi-dwarf tree about 60 to 70% as big as seedling. Induces early and heavy bearing. Extremely vigorous for a dwarfing rootstock, trees on M26 also begin bearing early and produce few suckers. An excellent choice for a small backyard. G.969 rootstock Mature height: Medium, 9ft-12ft It is also tolerant of wet conditions / phytophthora. We graft our apple, cider and crab-apple trees on to a wide range of traditional and modern rootstocks, to control the mature size of the tree and confer attributes such as disease-resistance and cold-hardiness. Although this rootstock produces many suckers, it is very cold-hardy and results in a heavy-bearing tree. Trees are moderately precocious and may lean with some cultivars and may require trunk support. The most dwarfing of all apple rootstocks, produces a tree which will be smaller than a person standing with their arms slightly spread out. Geneva®30 (G30) A fire blight resistant M7 size tree from Cornell University ; It is precocious and needs support ; Geneva® 'G.41' Geneva® 'G.11' Geneva® 'G.935' Geneva® 'G.890' Coming Soon: Geneva® 'G.214' and Geneva® 'G.210' T337 . 15 to 20 . It produces a tree somewhat larger than M26, similar to M7, and much heavier-cropping than either. M.7 EMLA has been widely planted since the 1960s with cultivars such as ‘McIntosh’, ‘Empire’, ‘Cortland’, ‘Golden Delicious’ and spur strains of ‘Delicious’. Selected in 1912 from unknown parentage at the East Malling Research station in Maidstone, Kent, England. In the commercial apple production industry it is easy to evaluate the relative anchorage of rootstocks because growers often use a wide range of rootstocks based on availability. M.7 is a semi-dwarfing apple rootstock producing 50-60% of standard apple tree. Geneva® rootstock descriptions are based on New York growing conditions. G.890 is tolerant to replant disease, and resistant to fire blight, crown rot, and wooly apple aphid. ALL VARIETIES GO TO SUBGROUPS. 20 or more. Similar or slightly less vigorous than M9, but with excellent winter cold hardiness. The rootstocks produce few root suckers or burr knots. It is susceptible to collar rot, but much less so than MM106. It is increasingly used in commercial orchards as a replacement for M9, planted at 2ft or 3ft spacings. Easy to grow and versatile. Similar to G.890 in most respects, but tree size is more variable depending on soil and climate. An M7-class rootstock with good resistance to fireblight and woolly aphid, crown rot and root rot, and tolerance of re-plant disease. It is resistant to fireblight and has some tolerance of wet conditions / phytophthora. It is not resistant to replant syndrome. It is productive and precocious, resistant to fireblight and replant disease, and for low-vigor scions can be planted at near-dwarf densities. 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