I normally record On The ledge in my pyjamas with an unwashed face and a mug of tea at ten o’clock at night, so last Friday it was rather a novelty to be at the RHS halls in London, it’s rather a fully dressed and mostly clean, with a cocktail in my hand, recording an episode of On The Ledge in front of a live audience. My guests were Alys Fowler, Birmingham-based gardener, garden writer and author of houseplant book Plant Love, and London-based horticulturist and garden designer Rob Stacewicz, both fellow plant addicts: I talked to Rob about his incredible UV Garden installation at the show showcasing, and finding out what’s on Alys’s plant Christmas list and taking questions from the audience.