“All extremes of feeling are allied with madness”, wrote Virginia Woolf in Orlando. She was onto something. We’re mad for plants here. We’re mad for stories and mad for this incredibly beautiful and mysterious world. This month we’ll be pushing our obsessive madness to its limits with tales of plant collectors, tulipomania, atomic gardening, healing and much more. If you want to keep up, you’ll need to run, or at least trot.