| Mean root length on shoots (cm) Type of Medium | |||
| IBA (ppm) | Palm fibre | Sphagnum moss | Mean |
| Water (Control) | 2.8 | 4.5 | 3.7 |
| 5000 | 3.7 | 4.8 | 4.4 |
| 10,000 | 7.9 | 9.0 | 8.2 |
| Mean | 4.6 | 6.1 | |