Before dividing your irises, gathering the necessary tools and ensuring the plants are well-prepared for the procedure can ...

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 ...

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 ...