Manual of Rootstocks

M40Vigorous stone fruit rootstock

Used for: European plum, Japanese plum, Apricot
Developed by: USDA-ARS
Country of origin: United States
Parentage: Prunus cerasifera x Prunus munsoniana

M40 is compatible with many prunes, apricots and Japanese plums. Its almond compatibility is similar to ‘Marianna 26-24’ and is incompatible with peaches, nectarines and some almond varieties.

M40 rootstock characteristics

  • Species compatibilityEuropean plum, Japanese plum, Apricot
  • Vigour % of standard85%
  • Rootstock size classVigorous
  • Support requiredFree-standing
  • Cold-hardinessCold-hardy
  • DeveloperUniversity of California Davis Plant Breeding Center
  • Country of originUnited States
  • PhytophthoraSome resistance
  • Bacterial cankerSome susceptibility
  • Root knot nematodeSome resistance
  • Honey / Oak root fungusSome resistance
  • Root suckersFew

Find our more about this rootstock in the 'Manual of Worldwide Temperate Zone Fruit and Nut Tree Rootstocks'.

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