The Ornamental Tree is one of the many Colonial Age decorations and can be build after reaching the Colonial Age. When the Ornamental Tree is polished, its output of happiness is doubled for 12 hours.
+105 per tile.
Your decoration can be polished to double the happiness provided to +210 for 12 hours.
- ↑ The efficiency is calculated by the happiness it provides divided by the number of squares the building takes up in size.