- See also:
- Intermediate dwarf10
Ottawa 3Dwarf M9 class rootstock
Used for: | Apple |
Developed by: | Agriculture and Agri-Food, Canada |
Country of origin: | Canada |
Introduced: | 1974 |
Parentage: | Robin x M.9 |
Use the ‘O.3’ with weak varieties such as ‘Delicious’, ‘Jonamac’, ‘Empire’, ‘Idared’ and ‘Honeycrisp’ or with weak soils or on replant soils.
Ottawa 3 rootstock characteristics
- Species compatibilityApple
- Vigour % of standard30% - 40%
- Rootstock size classDwarf
- PrecocityPrecocious
- Support requiredPermanent support
- Cold-hardinessCold-hardy
- Cold hardiness (USDA)(4) -30F / -34C
- Country of originCanada
- Period of origin1950 - 1999
- Virus toleranceVery susceptible
- Woolly aphidVery susceptible
- Fire blightVery susceptible
- Powdery mildewSome susceptibility
- Burr knotsNone
- Collar rotSome resistance
- Crown GallSome susceptibility
- Crown rotSome resistance
- Replant complexSome tolerance
- Root suckersSome
Find our more about this rootstock in the 'Manual of Worldwide Temperate Zone Fruit and Nut Tree Rootstocks'.