Q: We just had our first freeze. How do I clean up my plants?
Barb – Sterling, CO
A: Brrr! It’s certainly getting cold outside! Your aquatic plants are feeling the chill too, so now is a perfect time to clean them up and put them in a warmer place for winter. So bundle up, pull on your hip waders and Aqua Gloves to keep dry and warm, dig out your easy-to-use Pond Scissors and Pliers—and let’s get busy!
Hardy Water Lilies
Hardy water lilies can tolerate cooler temperatures than your tropical varieties, but they need to be kept in a place that won’t freeze, like the deepest areas of your pond. Now that you’ve had your first frost, trim the lilies’ foliage back to just above the root ball and submerge the plants as low as they’ll go for the winter. Come spring, the greenery will reemerge healthy as ever from the plants’ crowns.
Tropical Water Lilies
Tropical water lilies prefer warm temperatures all year-long, so these plants will need to be completely removed from your pond and relocated to a protected indoor space for the winter, like an aquarium or large bucket inside your heated garage or workshop. Check out this article for a step-by-step guide to overwintering tropical plants.
Marginals and Bog Plants
As with hardy water lilies, your marginals’ and bog plants’ foliage will need to trimmed back to just above the soil with pond scissors. Then sink them lower into the deepest parts of your pond where the water remains unfrozen during the wintertime.
Unless you live in a climate that doesn’t freeze, floating plants like hyacinth and water lettuce won’t survive the winter. Plan to remove them from your pond and toss them in your compost pile. If you leave them in the pond, the dead plants will decompose and cause water quality issues through the wintertime.
Pond Talk: If your aquatic plants are planted in the soil rather than a movable basket or pot, do you do anything special to them to prepare them for winter?