| Treatments | Chlorophyll (Spad units) | Height (cm) | Leaf area (cm2) | Dry matter of roots (g) | Dry matter of aerial part (g) |
| Control (water) | 32.0b | 13.5a | 7.9a | 0.07b | 0.61a |
| PBZ (150 mg∙L−1) | 38.2a | 11.3b | 5.5b | 0.13a | 0.75a |