Rootstock comparison table
| Rootstock | Ottawa 3 |
|---|---|
| Summary | Use the ‘O.3’ with weak varieties such as ‘Delicious’, ‘Jonamac’, ‘Empire’, ‘Idared’ and ‘Honeycrisp’ or with weak soils or on replant soils. |
| remove |
Using
| Ottawa 3 | |
|---|---|
| Species compatibility | Apple |
| Vigour % of standard | 30% - 40% |
Growing
| Ottawa 3 | |
|---|---|
| Rootstock size class | Dwarf |
| Precocity | Precocious |
| Support required | Permanent support |
Climate
| Ottawa 3 | |
|---|---|
| Cold-hardiness | Cold-hardy |
| Cold hardiness (USDA) | Zone 4 (-34C) |
Identification
| Ottawa 3 | |
|---|---|
| Country of origin | Canada |
| Period of origin | 1950 - 1999 |
Problems
| Ottawa 3 | |
|---|---|
| Virus tolerance | Very susceptible |
| Woolly aphid | Very susceptible |
| Fire blight | Very susceptible |
| Powdery mildew | Some susceptibility |
| Burr knots | None |
| Crown Gall | Some susceptibility |
| Collar rot | Some resistance |
| Replant complex | Some tolerance |
| Root suckers | Some |
| Crown rot | Some resistance |