Rootstock comparison table
| Rootstock | SJM 189 |
|---|---|
| Summary | SJM 189 is the least susceptible of the SJM series rootstocks to Phytophthora cactorum. |
| remove |
Using
| SJM 189 | |
|---|---|
| Species compatibility | Apple |
| Vigour % of standard | 30% - 40% |
Growing
| SJM 189 | |
|---|---|
| Rootstock size class | Dwarf |
| Precocity | Precocious |
| Support required | Permanent support |
Climate
| SJM 189 | |
|---|---|
| Cold-hardiness | Cold-hardy |
Identification
| SJM 189 | |
|---|---|
| Country of origin | Canada |
Problems
| SJM 189 | |
|---|---|
| Woolly aphid | Some resistance |
| Fire blight | Some resistance |
| Scab | Some resistance |
| Powdery mildew | Some resistance |
| Burr knots | Some |
| Collar rot | Some resistance |
| Root suckers | Some |
| Crown rot | Some resistance |