The growth on moss on most hard surfaces is not uncommon and artificial grass, whether it’s a playing field or an artificial putting green, is not immune to the problem. This could be a recurring problem if you have installed your backyard putting green in a part of the yard that is shaded for long periods of the day.
For an artificial putting green in particular, the presence of moss growing over the surface is a problem that must be dealt with quickly because it is crucial that the surface is smooth and allows the ball to roll without impairment.
The process of removing moss from the surface of artificial grass is a straightforward one, the main requirement is that you are vigilant and deal with the problem as soon as possible.
Brush Your Artificial Grass
Frequent brushing of your artificial grass will be beneficial for a couple of reasons. The first is that it will allow the grass fibres to stand upright in cases where they may have been squashed down. Brushing the grass will dislodge trapped dirt and grit and will allow the air to reach deeply into the pile. The brushing process will also remove any early growth making it a quick and cheap method of controlling moss.
The problem with the presence of moss on the surface of your artificial grass is that it is very likely that the spores are present below the surface within the shockpad or base below. In this case you are going to have frequent problems with the moss quickly returning after the surface moss is removed. This is where a chemical solution is going to be necessary.
Fungicide and Herbicide Removal
If you have let things go for a number of weeks or you find that moss has taken hold still go through the brushing or raking process. This will be a first step in a chemical removal process.
Purchase a recognized moss and algae killer, there are a few good ones available around the world. You will need a window of dry weather to perform the task. Starting with a dry surface, spread the moss and algae killer over the surface of the artificial grass and then simply leave it in place. A moss killer such as Batimoss CR or TerraCyte will continue to work until it is rinsed away by rain and will kill the existing growth plus the spores that would otherwise allow regrowth to take place.
A few chemicals that may be useful to consider include chlorothalonil (brand name Daconil Ultrex), copper hydroxide (brand name Junction) or carfentrazone (brand name Quicksilver). Make sure the instructions on the label are followed closely.
If you want to prevent moss from returning to your putting green there may be some changes to the conditions that will have to be made. Given that it is unlikely that the putting green can be moved to a sunnier spot, you might have to find a way to remove the source of the shade. Failing that, more frequent maintenance in which the grass is brushed or raked will have to take place.