Troubleshooting
Juno Iris problems — and how to fix them
Juno Iris (Iris graeberiana) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Summer bulb rot in wet climates
Persistent summer rainfall is the primary killer of Juno irises in the UK and Pacific Northwest. Either grow under glass that can be kept dry from June to September, or lift bulbs after foliage dies, store dry, and replant in autumn.
Fleshy root loss at planting
The thick, carrot-like storage roots are brittle and irreplaceable; losing them severely weakens or kills the plant. Prepare a wide, deep planting hole and lay the roots out gently before backfilling with gritty compost.
Prevent juno iris problems before they start
Most juno iris issues are care-mismatch, not bad luck. Dial in the basics:
Juno Iris problems — FAQ
Why is my juno iris summer bulb rot in wet climates?
Persistent summer rainfall is the primary killer of Juno irises in the UK and Pacific Northwest. Either grow under glass that can be kept dry from June to September, or lift bulbs after foliage dies, store dry, and replant in autumn.
Why is my juno iris fleshy root loss at planting?
The thick, carrot-like storage roots are brittle and irreplaceable; losing them severely weakens or kills the plant. Prepare a wide, deep planting hole and lay the roots out gently before backfilling with gritty compost.