| Clue | Source | Date |
|---|---|---|
| Celebrate Arbor Day, say (First 4 + last 1) | Universal | 14 Jun 2022 |
| Put down roots? | Wall Street Journal | 21 Apr 2020 |
| Spy from America leaves home perhaps to commemorate a visit to The Garden | Irish Times Crosaire | 30 Oct 2017 |
| Spy provides cover following American? It's something one does when opening doors for first time! | Irish Times Crosaire | 09 Apr 2015 |
| Arborist's catchphrase | ||
| Celebrate Arbor Day | ||
| Something to do on Arbor Day (and a hint to this puzzle's theme) | ||
| *Observe Arbor Day, say | ||
| *Observe Arbor Day, say | ||
| Observe Arbor Day | ||
| Arbor Day suggestion | ||
| Ecologist's plea |