With more than 250 species, irises grow from rhizomes rather than seeds, tubers, or bulbs. Rhizomes extend horizontally under ...
The second reason is that the plant needs room to grow, or it will have to compete for nutrients with other plants. “Dividing any herbaceous perennial—like the iris—will prolong the plant ...
You may be able to simply pull plants apart, but if the roots are tough use a knife or even a spade. Discard very old, unproductive pieces of rhizome at the heart of the clump. Replant irises in ...
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 ...