| Clue | Source | Date |
|---|---|---|
| Grand week arranged for opening of special London landmark (3,7) | ||
| A thousand nitrogen-fed ragweeds ruined planted area | The Telegraph Toughie | 17 May 2023 |
| *London site that has the world's largest collection of living plants | Wall Street Journal | 27 Feb 2018 |
| British botanical attraction | Newsday | 17 Nov 2016 |
| London co-creator of the International Plant Names Index | LA Times Daily | 09 Nov 2016 |
| London botanical attraction | ||
| British botanical attraction | ||
| Botanist's paradise near London |