Genus Starting With O
| Plant Name | Height | Spread |
|---|---|---|
| Onoclea sensibilis | 21 to 24 Inches | 2 to 3 Feet |
| Ophiopogon japonicus 'Ebony Knight' | 6 to 8 Inches | 10 to 12 Inches |
| Ophiopogon japonicus 'Nana' | 2 to 3 Inches | 10 to 12 Inches |
| Osmanthus fragrans aurantiacus | 12 to 15 Feet | 10 to 12 Feet |
| Osmanthus heterophyllus 'Goshiki' | 6 to 8 Feet | 6 to 8 Feet |
| Osmanthus x fortunei | 15 to 20 Feet | 15 to 20 Feet |
| Ostrya virginiana | 25 to 30 Feet | 20 to 25 Feet |
| Oxydendrum arboreum | 25 to 30 Feet | 20 to 25 Feet |