I've been away for a month, sorry. That is a beautiful picture you posted. A very young looking Edgar. I had not previously heard of Silvervine. Sounds appealing for cats. I introduced cat grass to a young (indoor only) cat recently and it ate most of it. Catnip it chewed a little. Cat mint it seemed interested in as well. Although the cat is indoor, it has a specially built access to a sectioned off part of the house deck so it can enjoy the fresh air and sunshine.

On that topic, a friend has built something more elaborate so the two cats can access under the house, climb through a tunnel (covered in chicken wire) that climbs above a shed, past a swimming pool and ends in a sectioned off part of the garden with fruit trees, catnip, cat grass and cat nip. Lots of ability to climb. Birds do not have access to that section of garden.