body

August 4

Irises
Posted on August 4th, 2011 at 3:01 PM by Newark Ohio Garden Club

DIVIDING IRISES -PART I

If you are lucky enough to  enjoy the beauty of irises in your garden in spring, you will want to take time now to assess whether your plants need to be divided. August and September are the times to divide your irises if they need it. You will want to divide your plants when the soil is still warm but the air has begun to cool. It is important to replant at this peak time when the disturbed roots have time to re-establish themselves without placing a severe demand on them to supply a lot of moisture to the leaves.  Wait until day time temperatures drop from the 90’s!

Irises do not need to be divided every year -usually every 3-4 years is the norm.

What are the signs that my irises need to be divided?

1. Irises that do not bloom as profusely as they once did. Overcrowded  rhizomes will produce fewer flowers.

2. Overcrowded rhizomes may also start to heave from the ground.  The plants may start to push on each other resulting in a mass that looks like a pile of snakes or spaghetti.

Watch for PART II HOW to DIVIDE and TRANSPLANT IRISES