Preserving Water Lettuce Over Winter: Buy New Each Spring

Q: How to preserve water lettuce year to year? Started with three plants, multiplied beyond belief.

A: Water lettuce is very cold-sensitive. Best way: float a few plants in an aquarium with a water heater, lots of light (south-facing window plus 100-watt equivalent CFL). But that's a lot of work for a plant that reproduces so quickly. Honest advice: buy new plants each spring.