Overwintering your Iris’s


October 28th, 2020 – By J. L. Wells

Iris Flowers - Rainbow Plants in Your Garden

Today I will be talking about overwintering your iris’s. Below will be a step-by-step guide to trimming your plants (division posts will become available later).

Trimming your iris’s isn’t a difficult task. Throughout the season if you see browning/yellowing leaves, cut back just under where the discoloration is at, but keep at eye out on the plant. Iris’s are prone to getting borers that burrow into the rhizomes and leaves, destroying the plant.

When the first couple of hard frosts have arrived, that should have knocked down a good portions of the leaves, which at this point you can cut back the leaves but this step is very important. When cutting the leaves, make sure you are cutting at an angle. Below will be a diagram of what the plant(s) should look.

Image titled Cut Back Irises in the Fall Step 4

Cover the base of each plant with your preferred coverings up to about 3 inches. This is help protect the roots/rhizomes, but do be cautious because if too much moisture is trapped root rot can occur. Iris’s are also prone to borers so keep an eye out. To get a better understanding of Iris borers and how to eliminate them check out Missouri Botanical Garden’s website.

When later winter/early spring arrives, make sure to pull back any leaves/mulch/debris that is around the base of the plant. This helps prevent any diseases or infestations to happen.

Be patient when spring arrives. The leaves will take a little bit to start to show up but they will show. The weather has to be just right for them to flourish. After the plant has flowered, cut back the stalk to promote more growth!

If you have any questions or concerns, please do not hesitate to comment below.

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