Troubleshooting
Green Arrow Arum problems — and how to fix them
Green Arrow Arum (Peltandra virginica) 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.
Crown rot
Caused by fungal pathogens in stagnant, oxygen-depleted water. Improve water circulation and avoid planting too deeply in the mud.
Aphid colonies on flower spathes
Greenfly can cluster on emerging spathes in spring. Blast off with a strong jet of water — avoid chemical sprays near pond water where fish or amphibians are present.
Clump overgrowth / congestion
Every 3–4 years the rhizome mass fills the basket and flowering declines. Divide in spring before growth resumes, discarding old woody sections and replanting vigorous outer pieces.
Prevent green arrow arum problems before they start
Most green arrow arum issues are care-mismatch, not bad luck. Dial in the basics:
Looking for green arrow arum in general rather than its problems? Read the full green arrow arum care guide — light, water, soil and feeding.
Green Arrow Arum problems — FAQ
Why is my green arrow arum crown rot?
Caused by fungal pathogens in stagnant, oxygen-depleted water. Improve water circulation and avoid planting too deeply in the mud.
Why is my green arrow arum aphid colonies on flower spathes?
Greenfly can cluster on emerging spathes in spring. Blast off with a strong jet of water — avoid chemical sprays near pond water where fish or amphibians are present.
Why is my green arrow arum clump overgrowth / congestion?
Every 3–4 years the rhizome mass fills the basket and flowering declines. Divide in spring before growth resumes, discarding old woody sections and replanting vigorous outer pieces.