Today is International Cat Day, and also the fifth anniversary of me offering our office manager Stanley Fluffypants a job. He turned up at the back door asking if we needed someone to supervise preparing kitten biscuits to feed the local hedgehogs. If you’re looking for a plant to celebrate the day with your cat, Nepeta cataria, Catnip is the obvious choice. But what if your cat isn’t a fan? Actinidia polygama, or Silver Vine, is another option. It has similar chemicals to Catnip, but can...