Q: Do I need to do anything to my aquatic plants this time of year?
Jaclyn – Tomahawk, WI
A: Shorter days and swaths of fall colors mean one thing: winter is on its way, and your aquatic plants will need some attention before the big chill sets in. 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 take care of some winter-prep pond plant chores!
Tropical Plants: Tropical water lilies, water hyacinth, water lettuce and other tropical plants prefer warm temperatures all year long. If you live in USDA Hardiness Zone nine or lower, you’ll need to completely remove these plants from your pond and relocate them to a protected indoor space for the winter, like an aquarium or large bucket inside a heated garage or workshop.
Tropical water lilies will need some extra care. When you pull the plants from your pond, remove any dead foliage, rinse the plant well, keep the tuber moist in distilled water and place it under a grow light until spring.
Keep in mind that despite these winterizing measures, your tropical aquatic plants might not survive the winter. They are from the tropics, after all …
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. Remove the plants from the pond, trim the foliage back to one to two inches above the root ball, and submerge them as low as they’ll go for the winter. Come spring, the greenery will reemerge healthy as ever from the plants’ crowns.
Bog Plants: Your bog plants’ leaves and stems will begin to die off as winter arrives, so you’ll need to trim them back to just above the soil with pond scissors. If they are in containers, sink them lower into the deepest parts of your pond where the water remains unfrozen during the wintertime. If they are planted directly into the ground, leave them alone for the winter.
Submerged Plants: The only thing your below-the-surface greenery needs is a quick trim to get rid of decaying and dead foliage. Cut plants in containers back to one inch above the pot and submerge in the center of the pond; any plants living directly in the ground can be left as-is.
Floating Plants: Unless you live in a climate that doesn’t freeze, floating plants like water hyacinth and water lettuce won’t survive the winter. Plan to remove them from your pond after the first hard freeze and toss them in your compost pile. If you leave them in the pond, the dead plants will decompose and cause water quality issues this winter.
While you’re preparing your plants for winter, take some time to do a little clean up around your pond. Remove any dead leaves and foliage, and rake or net out leaves and fallen debris. Water quality matters – even in the winter!
Pond Talk: How long does it take you to prepare your aquatic plants for winter?
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