Plant Hardiness Zone by Municipality
Ontario
| 1961-1990 zone | 1981-2010 zone | 1961-1990 hardiness index | 1981-2010 hardiness index |
Oakville | 6a | 6b | 62 | 67 |
Oakwood | 5a | 5b | 52 | 55 |
Oba | 1b | 2b | 17 | 27 |
Odessa | 5b | 6a | 56 | 60 |
Oil Springs | 6a | 6b | 63 | 66 |
Oliphant | 5b | 6a | 56 | 62 |
Omemee | 5a | 5b | 52 | 56 |
Ompah | 4a | 5a | 42 | 50 |
Onaping Falls | 3b | 4a | 35 | 43 |
Opasatika | 1b | 2a | 16 | 24 |
Orangeville | 4b | 5a | 47 | 54 |
Orillia | 5a | 5b | 51 | 58 |
Orléans | 4b | 5a | 48 | 53 |
Orono | 5b | 6a | 57 | 61 |
Orrville | 4b | 5a | 46 | 52 |
Osgoode | 5a | 5b | 50 | 56 |
Oshawa | 5b | 6a | 58 | 63 |
Osnaburgh House | 1b | 2b | 18 | 29 |
Ottawa | 4b | 5b | 49 | 55 |
Otterville | 5b | 6a | 59 | 64 |
Owen Sound | 5b | 6a | 55 | 62 |
- Date modified: