Can I save a plant with root rot?

If you catch it early and remove all the infected tissue, you can often save the healthy parts of the rhizome. Make sure to replant in a spot with better drainage.

Do Siberian irises like wet soil?

They enjoy consistent moisture, but they do not like to sit in standing water. Think of it as moist, not swampy.

Siberian iris: root rot, causes and fixes

Check these first

Inspect the base of the plant for signs of tunneling or chewed leaves.
Feel the soil to see if it is waterlogged or muddy.
Gently tug on the plant to see if it feels loose in the ground.

Likely causes

Iris borer damage
Most likely
How to tell: You will see chewed leaves or holes in the rhizome where caterpillars have tunneled. The plant will look weak and eventually collapse as the rot sets in.
What to do: Dig up the rhizome and cut away any soft, mushy parts with a clean knife. Dispose of the infested material in the trash, not your compost, and replant the healthy portion in fresh soil.
Poor drainage
Possible
How to tell: The soil feels constantly swampy or muddy, and the leaves start yellowing from the bottom up. The roots will look dark and slimy instead of firm and white.
What to do: Amend your soil with organic matter like compost to improve drainage. If the plant is in a low spot, consider moving it to a raised bed or a location where water does not pool.

Find out what's wrong with your siberian iris

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

When to worry

If the entire clump is mushy and smells foul, the plant is likely too far gone to save. It is normal for the outer leaves to die back slightly after the bloom season ends.

Stopping it coming back

Keep the area around your irises clear of old foliage and debris to discourage borers. Ensure the soil is rich but well draining so it never stays saturated.

Keep your siberian iris healthy from here

Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked. Identification and a health check are free.

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Questions people ask

Can I save a plant with root rot?: If you catch it early and remove all the infected tissue, you can often save the healthy parts of the rhizome. Make sure to replant in a spot with better drainage.
Do Siberian irises like wet soil?: They enjoy consistent moisture, but they do not like to sit in standing water. Think of it as moist, not swampy.

Why is my Siberian iris rotting at the base?