Troubleshooting
Canna-leaved Peace Lily problems — and how to fix them
Canna-leaved Peace Lily (Spathiphyllum cannifolium) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Slow or no flowering
Species-type peace lilies can be reluctant bloomers indoors compared to cultivars bred for flower production. Ensure adequate indirect light, allow a slightly cooler resting period in autumn, and avoid high-nitrogen fertilisers that encourage vegetative growth at the expense of blooms.
Root rot
Overwatering or poorly draining soil leads to root rot, evidenced by yellowing leaves, wilting despite moist soil, and a foul smell from the compost. Remove affected roots, treat with a fungicide if severe, and repot into fresh, well-draining mix.
Fungus gnats
Larvae develop in consistently moist, organic-rich compost. Allow the surface to dry slightly between waterings, apply a layer of horticultural grit as a top dressing, and use yellow sticky traps to monitor adult populations. Biological control with Steinernema feltiae nematodes is effective.
Prevent canna-leaved peace lily problems before they start
Most canna-leaved peace lily issues are care-mismatch, not bad luck. Dial in the basics:
Canna-leaved Peace Lily problems — FAQ
Why is my canna-leaved peace lily slow or no flowering?
Species-type peace lilies can be reluctant bloomers indoors compared to cultivars bred for flower production. Ensure adequate indirect light, allow a slightly cooler resting period in autumn, and avoid high-nitrogen fertilisers that encourage vegetative growth at the expense of blooms.
Why is my canna-leaved peace lily root rot?
Overwatering or poorly draining soil leads to root rot, evidenced by yellowing leaves, wilting despite moist soil, and a foul smell from the compost. Remove affected roots, treat with a fungicide if severe, and repot into fresh, well-draining mix.
Why is my canna-leaved peace lily fungus gnats?
Larvae develop in consistently moist, organic-rich compost. Allow the surface to dry slightly between waterings, apply a layer of horticultural grit as a top dressing, and use yellow sticky traps to monitor adult populations. Biological control with Steinernema feltiae nematodes is effective.