However, after several years the clumps will run out of steam and die off in the middle, leaving plants that are reluctant to flower. Fortunately it's easy to revive them. Irises spread by ...

Most all of us are familiar with the bearded iris in some form or another ... Within two to four years you will have plenty of your original plant to share with friends or to other places in ...

Four-part series in which Carol Klein explores the inner secrets and botanical history of four of our favourite garden plants: the rose, the tulip, the iris and the water lily.