| Hutton | Judy | Stayner | Yes | | | Stayner HS |
| Hynna | Marie | Thunder Bay | Yes | | | D14 Thunder Bay HS |
| Ilnitski | Colette | Sudbury | Yes | | | D13 Sudbury HS |
| Innes | Anne | Embro | Yes | | | D 10 |
| Izsak | Patricia | Thunder Bay | Yes | | | |
| King | Sheila | Manotick | Yes | | | D 2 Manotick HS |
| Koch | Carole | Gloucester | Yes | | | D 2 Nepean HS |
| Lang | Kathleen | Jasper | Yes | GCO-design, RBG-hort | - All Districts
- D01
- D02
- D03
- D04
- D05
- D06
- D07
- D08
- D09
- D10
- D11
- D12
- D13
- D14
- D15
- D16
- D17
- D18
- D19
| D 2 |
| Larson | Marj | Oxdrift | Yes | | | |
| Lebeau | Heather | Carleton Place | Yes | GCO-design | | |
| Lindsay | Kathryn | Renfrew | Yes | GCO-design | - D01
- D02
- D03
- D04
- D07
- D08
- D16
- D17
- D19
| |
| Lovering | Dale | Orillia | Yes | RGB-Hort and Canadian Rose Society | | |
| Lukace | Felicity | Lindsay | Yes | | | |
| Luski | Lorraine | North York | Yes | | | D 5 North York Garden Club |
| Lynch | Michelle | Oro Medonte | Yes | GCO-design, Rose, RGB-Hort | | |
| Lynott | Linda | Richmond Hill | Yes | GCO-design, ADS Dahlia Judge | | |
| Mabee | Jim | Tillsonburg | Yes | GCO-design, Lily | | D 10 Tillsonburg HS |
| MacDonnell | Gillian | Ottawa | Yes | | | |
| MacKenzie | Shelley | Fingal | Yes | | | |
| MacQuarrie | Gay | Kanata(Ottawa) | Yes | | | |
| McCutcheon | Marie | Brussels | Yes | | | |
| McGill | Catherine | Caledonia | Yes | RGB-hort | | D 6 Haldimand HS |
| McKenzie | Lois | Desbarats | Yes | | | |
| McLean | Mary | Toronto | Yes | Design 2016 | | |
| Melanson | Wendy | L'Amable | Yes | | | D 3 Bancroft HS |
