With more than 250 species, irises grow from rhizomes rather than seeds, tubers, or bulbs. Rhizomes extend horizontally under ...
With their colourful, unique flowers and their ability to grow in every corner of your garden, we wouldn’t be surprised if you wanted to plant iris bulbs. But knowing when to plant iris bulbs ...
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 ...