Betsy from Media Pa writes
After applying Bayer Advanced 2 In 1 Moss & Algae Killer RTS, moss will quickly yellow and then turn brown. Timing can vary from region to region as during warmer weather you want to apply late in the day. If you are having colder weather, cold weather may delay the appearance of moss damage. Repeat treatments can be done every 2 weeks.
Answer last updated on: 04/22/2019