The general theme is that apparently the Royal Britannic Garden in Edinburgh is to investigate the behaviour of every plant in its collection amid concern that more than 100 species may pose a threat to wildlife. These presumably are non-native species.
On the right-hand side of the column you'll see:
"Among those with a fondness for non-native plants is JK Rowling who plans to introduce several varieties at her Edinburgh home", then they are listed. "They include holm oak evergreen, native to the Mediterranean, which is invading southeast England. It's listed as a plant to avoid."
So the suggestion there is that these plants or trees aren't yet there, but you're planning to introduce them. I think that's clear from what's being said. Do you have a comment on that?