Outdoors

Is there an environmentally friendly way of killing mosses and lichens?

Close-up of moss and lichen Photo by oplot8/Shutterstock

Is there an environmentally friendly way of killing mosses and lichens growing on steps leading to the dock?

Mosses and lichens are hardy—that’s why they’re all over cottage country—and the only earth-friendly way to get them off your wood is elbow grease. Unfortunately, this won’t keep them from returning. Rotting wood—like the kind you might find in an old dock—is the perfect substrate for mosses. And lichens grow on the wood simply because wood is a good place to live. Both lichens and mosses grow on healthy wood too, so their presence doesn’t always mean your dock or boathouse is rotting. While the growths won’t cause your wood to rot they absorb moisture, making rot more likely. Also—wipeout alert—lichens lead to slippery surfaces.

Lichens grow at a molasses-like rate, so once they’re scraped off, you won’t need to scrub again for a few years. But in a combination of moist, sunny, and warm conditions, mosses grow faster, and might need to be removed once or twice per season. Make the wood less hospitable by keeping it drier (trim back trees, for example, to allow more sun on the area).

Sign up for our newsletters

By submitting your information via this form, you agree to receive electronic communications from Cottage Life Media, a division of Blue Ant Media Solutions Inc., containing news, updates and promotions regarding cottage living and Cottage Life's products. You may withdraw your consent at any time.

Weekly

The latest cottage-country news, trending stories, and how-to advice

Bi-weekly

Fix-it info, project ideas, and maintenance tips from our DIY experts

Monthly

Nature and environment news and inspiration for people who love to get outside

Weekly

Need-to-know info about buying, selling, and renting cottage real estate

Five-part series

Untangle the thorny process of cottage succession with expert advice from lawyer, Peter Lillico