Troubleshooting
Giant Water Lily problems — and how to fix them
Giant Water Lily (Nymphaea gigantea) 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.
Dormancy in cool water
Below 24°C (75°F) the plant ceases active growth and may die back entirely. In temperate climates, lift the tuber before water temperatures drop in autumn, store in barely moist peat at 18–20°C, and replant in late spring.
Water lily beetle (Galerucella nymphaeae)
Adults and larvae strip the upper surface of leaves leaving brown scars; remove affected pads and submerge remaining foliage temporarily to dislodge larvae into the water for fish to consume.
Prevent giant water lily problems before they start
Most giant water lily issues are care-mismatch, not bad luck. Dial in the basics:
Giant Water Lily problems — FAQ
Why is my giant water lily dormancy in cool water?
Below 24°C (75°F) the plant ceases active growth and may die back entirely. In temperate climates, lift the tuber before water temperatures drop in autumn, store in barely moist peat at 18–20°C, and replant in late spring.
Why is my giant water lily water lily beetle (galerucella nymphaeae)?
Adults and larvae strip the upper surface of leaves leaving brown scars; remove affected pads and submerge remaining foliage temporarily to dislodge larvae into the water for fish to consume.