In this issue of The Plantsman we look at developments in hardy Corydalis. Brian Whitton finds that recent introductions are compared with more widely grown species and cultivars. Also, Sue Hockland talks about how to make best use of the increasing range of Nematodes that is becoming available as biological control agents. Finally, following a recent trial of border Euphorbia, the best are discussed. There are some surprises among those that have either gained or lost their Awards of Garden Merit.