Moss and Algae removal that will not kill backyard plants
Howdy, I don't know if you will have a recommendation but the situation is this: I have algae growth that is absolutely out of control on my deck. It actually caused my dog slip and injure herself. I need to get this stuff off my deck. My deck is surrounded by sod and several plants (blueberry bush, rosebushes, and some I have no idea what they are). Is there a product or process that is safe for my poor plants that abut the deck and will get the runoff?
Multnomah County Oregon
Here in the northwest, most information is about removing moss and lichens. Algae should respond to a bit less effort. For instance, I’ve found that periodic vigorous sweeping of my sunny concrete patio will remove algae while still wet and, then, I repeat the process as needed through our rainy season.
Some of the methods used against moss will work against the algae. Consider a power washer, making certain to decrease the pressure to avoid damaging the wood. Or apply a commercial solution made especially for use against moss and, then, thoroughly rinsing the deck. Commercial chlorine bleach can be strong smelling and somewhat risky to handle whereas oxygen-bleaches are milder but effective against algae. Good sources of mild but effective products are paint stores and large garden centers.
Still more ideas: ”Methods of moss removal” http://bryophytes.science.oregonstate.edu/page18.htm; “Outdoor cleaning solutions” http://extension.usu.edu/files/publications/factsheet/pub__3096233.pdf ; and “Siding and other exterior surfaces” https://fyi.uwex.edu/house/about-the-house/siding-and-other-exterior-surfaces/
During the cleaning, protect nearby delicate, fragile, and/or treasured garden plants with a light cover.